Tag: Coffee

All About Filter Coffee

14 Nov 20
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Filter Coffee: coffee made by filtering hot water through dark roasted and rough ground beans. The resulting brew is allowed to rest before serving. The paper filter stops the coffee grounds from getting into the brewed coffee.

The simplest filter coffeemaker is the domestic coffeemaker.

It consists of a glass jug and a plastic filter cone placed above it.

Preheat the glass jug with a small amount of hot water.

Place the paper filter in the cone.

Place the correct amount of coffee in the filter. 55-60 grams is the correct measurement for 1 litre of water.

Lightly shake the cone to evenly distribute the coffee.

Boil some water in a kettle (92-96 degrees) and leave to cool for 10-15 seconds. Then, pour in just enough hot water to wet the coffee in the filter.

After a few seconds, pour the remaining water over the coffee.

Within a few minutes, the coffee will have dripped into the glass jug at which time it is ready to be drunk.

Use hot water or the steam nozzle of an espresso machine to preheat the cylindrical glass jug.

Place the ground coffee in the bottom of the jug. One cup of coffee (150 ml of water) requires 5-6 grams (about one tablespoon) of filter coffee. Use 55 grams of coffee per litre of water.

Pour hot water over the coffee.

Place the plunger over the lid of the jug and allow the coffee to steep for 3-5 minutes.

Before drinking the coffee, slowly push down the plunger. This process separates the grounds from the coffee infusion.

Make sure to follow the instruction in the coffeemaker’s manual.

Electric filter coffeemakers work on the same principle as the drip method. The first step is to fill the water reservoir with cold water.

If the machine does not have its own filter, place a paper filter in the filter cone.

Place the desired amount of coffee in the filter. The correct measure is 55 grams of coffee per litre of water, so 5-6 grams (about one tablespoon) of coffee makes one cup of coffee. Try a number of variations in order to discover the amount of coffee needed to create your desired strength.

Lightly shake the cone to evenly distribute the coffee.

When the machine is switched on, it heats the water to the desired temperature and begins to drip water into the filter cone.

The vertical gauge on the coffeemaker’s water reservoir shows the water level and its equivalent cup measurement.

The hot plate under the glass jug keeps the coffee warm as long as the coffeemaker is left switched on.

Filter coffee should be consumed within 20 minutes.

The filter should be emptied after every use. Never re-use the coffee grounds.

These types of filter coffeemakers are mainly used in medium to large businesses such as cafes, restaurants and hotels.

Professional filter coffeemakers function exactly the same way as domestic filter coffeemakers.

Make sure to follow the instructions in the coffeemaker’s manual.

Large, commercial filter coffeemakers also have hot plates that keep the coffee warm and ready to be served.

Filter coffee should be consumed within 20 minutes.

Espresso coffee: coffee made by forcing hot water under pressure through finely ground, dark roasted coffee. Espresso is thicker and stronger than filter coffee. A good cup of espresso features a layer of natural froth known as the “crema”. Sugar can be added to espresso after it has been served.

Fill the lower chamber with cold water.

Place the ground espresso coffee in the middle filter chamber.

Make sure that the filter chamber is filled to the rim with ground coffee.

Lightly tamp down the coffee in the filter.

Brush off any coffee that has spilled over and place the filter chamber on top of the water chamber.

Tightly screw on the top chamber and place the coffeepot on the stove over a low heat.

As the water boils, the steam forces the water up through the filter and then up through a central tube into the top chamber where it brews.

When the sound of boiling stops, the top compartment has filled with coffee.

Take the coffeepot off the stove. Allow to rest for a few moments and then serve.

These are generally used by hotels, restaurants and cafes.

The espresso machine operator or “barista” places roasted coffee beans in a special grinder that has a dosage system. Some machines are equipped with their own internal grinder.

Cold water is placed in the water reservoir.

7 grams of finely ground coffee are used to make one cup of espresso.

The ground coffee is placed in a portafilter, the cupped handle on an espresso machine that holds the coffee during the brewing process

The coffee is tamped with a special tamper that compresses the coffee.

The tamped coffee is placed into the group head, through which a pressurised stream of hot water flows.

A cup is placed under the portafilter spout. When turned on, the machine begins to brew the espresso.

When the cup is 2/3 full (40 ml), the process is stopped.

Steam foamed milk is added to espresso and lightly sprinkled with cacao or flakes of chocolate.

To make cappuccino, 2-3 tablespoons of foam are first spooned onto the espresso.

Holding the rest of the foam back with a spoon, the hot milk is slowly poured through the foam into the coffee.

To clean the spout and check whether the steam is ready, rapidly turn the steam spout on and off.

Pour the milk into a half-litre stainless steel jug. To make cappuccino, use 125 ml of cold milk. Use 250 ml for latte.

As the best froth is achieved using cold milk, the frothed milk is prepared first.

Place the steam spout 1-2 cm into the milk and slowly tilt the jug forward.

Turn on the steam spout. The milk will begin to froth.

As the foam rises, raise the spout so that the tip is always just below the surface of the milk.

Steam the milk until it reaches 2-3 times its original height.

A good, soft froth should be achieved.

After making the froth, heat the milk by lowering the steam spout almost until it touches the bottom of the steel jug.

In 5-10 seconds, when the bottom of the jug warms up, turn off the steam spout.

After frothing the milk, clean the steam spout by rapidly turning it on and off. If necessary, wipe the spout with a clean cloth. Be careful, as the steam spout will be very hot.

A good foam should cling to the back of a spoon.

Espresso crema should range in colour from light brown to cacao-coloured, occasionally with dark brown veins.

The foam should be 3-4 mm high and long lasting.

It should be strong, aromatic, full-bodied and delicious with a slightly sweet scent.

It should have a long lasting flavour

Tips for a making a full-bodied, delicious cup of espresso:

Use 6.5-7 g of coffee.

Set the machine’s pump to 9-10 atmospheres.

Set the water temperature to 90 degrees on the pressure regulator.

Make sure that the espresso cup is filled 2/3 full within 25-30 seconds.

Weak espresso has a thin layer of foam that is light in colour, has large bubbles and is quick to disperse.

The espresso tastes weak, has no aroma and is bland.

Reasons why espresso can taste weak:

Did you use less than 6 g of ground coffee?

Did you use rough ground coffee?

Did you use lightly tamped coffee or coffee that was not tamped at all?

If the coffee was poured into the cup in 20 seconds or less, the coffee may have been rough ground and may not have been tamped.

Was the water temperature below 88 degrees?

Was the pump pressure less than 9 atmospheres?

When was the packet opened?

Was the container stored at room temperature?

If you used roasted coffee beans, were the blades of the grinder dull?

Was the right setting selected on the grinder?

If you used a grinder that automatically adjusts the dosage, was the correct dose selected and was the amount of coffee ground always between 6-7 g?

Was the machine cleaned following the instructions in the manual?

Was the filter the right size for the number of cups?

Strong espresso has dark brown layer of foam with white dots or a black hole in the centre.

The thin layer of foam tends to drift towards the rim and to form a black circle.

The espresso has a strong taste, is bitter and has no aroma.

Reasons why your espresso may taste too strong:

Did you use more than 7 g of ground coffee?

Was your coffee very finely ground?

Did you over tamp the coffee?

If the coffee was poured into the cup in 35 seconds or more, the coffee may have been over ground or over tamped.

Was the water temperature over 88 degrees?

Was the pump pressure greater than 10 atmospheres?

If you used roasted coffee beans, were the blades of the grinder dull?

Was the right setting selected on the grinder?

If you used a grinder that automatically adjusts the dosage, was the correct dose selected and was the amount of coffee ground always between 6-7 g?

Was the machine cleaned following the instructions in the manual?

Was the filter the right size for the number of cups?

A brief history of coffee

14 Nov 20
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600 Coffee makes its migration from Ethiopia to Arabia
1000 The philosopher Avicenna first describes the medicinal qualities of coffee, which he refers to as bunchum
c.1300 Islamic monks brew qawha, a brew of hot water and roasted coffee beans
1470-1500 Coffee use spreads to Mecca and Medina
1517 Sultan Selim I introduces coffee to Constantinople after conquering Egypt
1554 Constantinople’s first coffee houses open
1570-1580 Coffee houses in Constantinople ordered closed by religious authorities
1600 Baba Budan, a Moslem pilgrim, introduces coffee to southern India
1616 Coffee is brought from Mocha to Holland
1645 The first coffee house opens in Venice
1650 The first coffee house opens in England (at Oxford)
1658 The Dutch begin cultivating coffee in Ceylon (Sri Lanka)
1668 Coffee is introduced to North America
1669 Coffee catches on in Paris when a Turkish ambassador spend a year at the court of Louis XIV
1670 Coffee is introduced to Germany
1674 The Women’s Petition Against Coffee is introduced in London
1675 King Charles II orders all London coffee houses closed, calling them places of sedition
1679 Marseilles’ physicians try to discredit coffee, claiming it is harmful to health
The first coffee house in Germany opens in Hamburg
1689 The first enduring Parisian cafe, Cafe de Procope, opens
1696 The King’s Arms, New York’s first coffee house, opens
1706 The first samples of coffee grown in Java are brought back to Amsterdam
1714 A coffee plant, raised from a seed of the Java samples, is presented by the Dutch to Louis XIV and maintained in the Jardin des Plantes in Paris
1720 The still-enduring Caffe Florian opens in Florence
1723 Gabriel de Clieu brings a coffee seedling from France to Martinique
1727 Francisco de Mello Palheta brings seeds and plants from French Guiana to Brazil
1730 The English bring coffee cultivation to Brazil
1732 Bach composes The Coffee Cantata, parodying the German panaroia over coffee’s growing popularity
1777 Prussia’s Frederick the Great issues a manifesto denouncing coffee in favour of the national drink, beer
1809 The first coffee imported from Brazil arrives in Salem, Mass.
1869 Coffee leaf rust appears in Ceylon. Within 10 years the disease destroys most of the plantations in India, Ceylon and other parts of Asia
1873 The first successful national brand of packaged roast ground coffee, Ariosa, is marketed by John Arbuckle
1882 The New York Coffee Exchange commences business
1904 The modern espresso machine is invented by Fernando Illy
1906 Brazil withholds some coffee from the market in an attempt to boost global prices
1910 German decaffeinated coffee is introduced to the U.S. by Merck & Co., under the name Dekafa
1911 American coffee roasters organize into a national association, the precursor to the National Coffee Association
1928 The Colomian Coffee Federation is established
1938 Nestle technicians in Brazil invent Nescafe, the first commercially successful instant coffee
1941-1945 U.S. troops bring instant coffee to a global audience
1959 Juan Valdez becomes the face of Colombian coffee
1962 Peak in American per-capita coffee consumption — more than three cups a day
1964 First Tim Horton’s opens in Hamilton, Ont.
1971 First Starbucks opens in Seatlle
1973 First fair-trade coffee is imported to Europe from Guatemala
1975 Global coffee prices rise dramatically after Brazil suffers a severe frost
Second Cup makes its debut in Canada
1989 International Coffee Agreement collapses as world prices drop to an historic low
early 1990s Specialty coffee catches on in the U.S.
mid 1990s Organic coffee becomes the fastest growing segment of the specialty coffee industry
1997 Tim Horton’s introduces first specialty coffees, English Toffee and french Vanilla flavoured cappuccinos
1998 Starbucks approaches 2,000 U.S. outlets, with as many planned for Asia and Europe

 

Coffee is practically a health food: Myth or fact?

14 Nov 20
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Myth or fact? Coffee is good for you.

If you chose fact, you’re right. New studies this week add to dozens more reporting the health benefits of coffee, including protection from type 2 diabetes, Parkinson’s disease, liver diseaseprostate cancer, Alzheimer’s, computer back pain and more.

But if you chose myth, you’d also be right. There are times when coffee is bad for you, and it depends on your genetics, your age and even how you make your coffee.

Good to the last drop

Coffee lovers rejoice! There are more studies than ever encouraging you to sip for your good health.

A huge study of more than 25,000 coffee drinkers in South Korea shows that moderate daily consumption — that’s three to five cups a day — is associated with a decreased risk for coronary artery calcium. CAC is a great predictor of future heart disease and hasn’t been studied much in the past.

Four cups of coffee a day was also recently found to moderately reduce one’s risk for melanoma, a highly dangerous skin cancer. It has to be leaded, though; in the study decaffeinated coffee didn’t provide any protection. The study supports a previous finding of a link between coffee and a reduced risk for basal cell carcinoma, the most common type of skin cancer.

Another recent study looked at coffee consumption and multiple sclerosis. It found high coffee intake — that’s four to six cups a day — reduced the risk of getting MS. So did drinking a lot of coffee over five to 10 years. Researchers now want to study coffee’s impact on relapses and long-term disability in MS.

Add this to the existing research on Parkinson’s and Alzheimer’s, and investigators now believe coffee could be neuroprotective, meaning that it is possible the drink is suppressing the production of inflammatory markers in the brain. And it may be more than the caffeine in coffee that’s responsible. Researchers are starting to look at other compounds in coffee that may help as well.

Before you run off to your favorite coffee spot for a double mocha latte, note one thing about these studies.

Most research defines a “cup” of coffee at 5 to 8 ounces, about a 100mg of caffeine, and black or maybe with a bit of cream or sugar. It is not one of those 24-ounce monsters topped with caramel and whipped cream.

Chock full o’ studies

Coffee has been studied a lot, and not just recently.

The Harvard Health Professionals Follow-Up Study, which began in 1986, and the Nurses’ Health Study, which started in 1976, have been following coffee consumption habits of healthy men and women for decades.

“We did not find any relationship between coffee consumption and increased risk of death from any cause, death from cancer, or death from cardiovascular disease. Even people who drank up to six cups of coffee per day were at no higher risk of death,” writes Dr. Rob van Dam of Harvard’s School of Health.

So why was coffee given a bad rap for so long?

Earlier studies didn’t always factor out serious health behaviors that used to go along with coffee, such as smoking and a lack of physical activity. Today’s coffee drinker doesn’t necessarily fit that mold and researchers are more likely to screen for those behaviors in their results.

Make mine a tea

While the health benefits of coffee keep rolling in, the complete story isn’t so rosy. In some studies, very high consumption — six or more cups a day — reduced the benefits.

Some populations can find coffee consumption potentially harmful. People with sleep issues or uncontrolled diabetes may need to ask their doctors before adding caffeine to their diets. There’s also a concern about caffeine use among youths.

And there’s a genetic mutation many of us have that can affect how fast our bodies metabolize caffeine. The gene is called CYP1A2 — if you have the slow version, it would explain why you crawl the walls after only a cup or two or why it might contribute to your high blood pressure.

Women should take particular note. Coffee may increase menopausal hot flashes. And pregnant women might be more likely to miscarry — the jury is still out — but caffeine does reach the fetus and might restrict growth. Doctors recommend only a cup a day during pregnancy.

And interestingly enough, the way you make your coffee could also make a health difference — there’s a compound called cafestol in the oily part of coffee that can increase your bad cholesterol or LDL. It’s caught in the paper filters, so as long as you use those to make your morning joe, you should be fine. But if you’re a lover of French press, Turkish coffee or the boiled coffee popular in Scandinavian countries, you could be putting your health at risk.

For many of us, coffee is a blessing. And as long as you avoid its pitfalls, current science seems to be saying you can continue to enjoy it, guilt free.

Drinking more coffee leads to a longer life, two studies say

14 Nov 20
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Greater consumption of coffee could lead to a longer life, according to two new studies published Monday.

The findings have resurfaced the centuries-old conversation on coffee’s health effects.

One study surveyed more than 520,000 people in 10 European countries, making it the largest study to date on coffee and mortality, and found that drinking more coffee could significantly lower a person’s risk of mortality.

The second study was more novel, as it focused on non-white populations. After surveying over 185,000 African-Americans, Native Americans, Hawaiians, Japanese-Americans, Latinos and whites, the researchers found that coffee increases longevity across various races.

People who drank two to four cups a day had an 18% lower risk of death compared with people who did not drink coffee, according to the study. These findings areconsistent with previous studies that had looked at majority white populations, said Veronica Wendy Setiawan, associate professor of preventative medicine at USC’s Keck School of Medicine, who led the study on nonwhite populations.

“Given these very diverse populations, all these people have different lifestyles. They have very different dietary habits and different susceptibilities — and we still find similar patterns,” Setiawan said.

The new study shows that there is a stronger biological possibility for the relationship between coffee and longevity and found that mortality was inversely related to coffee consumption for heart disease, cancer, respiratory disease, stroke, diabetes and kidney disease.

The study on European countries revealed an inverse association between coffee and liver disease, suicide in men, cancer in women, digestive diseases and circulatory diseases. Those who drank three or more cups a day had a lower risk for all-cause death than people who did not drink coffee.

Both studies were published in the Annals of Internal Medicine.

“We looked at multiple countries across Europe, where the way the population drinks coffee and prepares coffee is quite different,” said Marc Gunter, reader in cancer epidemiology and prevention at Imperial College’s School of Public Health in the UK, who co-authored the European study.

“The fact that we saw the same relationships in different countries is kind of the implication that its something about coffee rather than its something about the way that coffee is prepared or the way it’s drunk,” he said.

The biological benefits — and caveats

Coffee is a complex mixture of compounds, some of which have been revealed in laboratories to have biological effects, Gunter said.

Studies have shown that certain compounds have neuroprotective and anti-inflammatory properties that can help reduce risk for illnesses like Parkinson’s disease.

In the European study, people who were drinking coffee tended to have lower levels of inflammation, healthier lipid profiles and better glucose control compared with those who weren’t. It is still unclear which particular compounds provide health benefits, but Gunter said he would be interested in exploring this further.

Both studies separated smokers from nonsmokers, since smoking is known to reduce lifespan and is linked to various deceases. However, they found that coffee had inverse effects on mortality for smokers too.

“Smoking doesn’t seem to blunt the effects of coffee,” Gunter said. “It didn’t matter whether you smoked or not. There was still a potential beneficial affect of coffee on mortality.”

However, Dr. Alberto Ascherio, professor of Epidemiology and Nutrition at Harvard T.H. Chan School of Public Health, said people should be wary of this finding.

“Even if it was in some way true, it doesn’t make sense to me, because by smoking, you increase your mortality several-fold. Then, if you reduce it by 10% drinking coffee, give me a break,” said Ascherio, who was not involved in the study.

“I think it’s a dangerous proposition because it suggests that a smoker can counteract the effects of smoking by drinking coffee, which is borderline insane.”

The studies complement work that has been done on coffee and mortality, he said, and it has been reasonably documented that coffee drinkers have a lower risk of death.

With all observations from previous studies, however, it’s difficult to exclude the possibility that coffee drinkers are just healthier to begin with, Gunter said.

People who avoid coffee, particularly in places like the US and Europe where drinking the beverage is very common, may do so because they have health problems. Their higher mortality rate could be a result of them being less healthy to begin with.

“I think that the solid conclusion is that if you’re a coffee drinker, keep drinking your coffee and be happy,” Ascherio said. And if you’re not? “I think you can go on drinking your tea or water without a problem.”

Meanwhile, Gunter and Setiawan stand a bit more firmly on coffee as a health benefit.

“The takeaway message would be that drinking a couple cups of coffee a day doesn’t do you any harm, and actually, it might be doing you some good,” he said.

“Moderate coffee consumption can be incorporated into a healthy diet and lifestyle,” Setiawan said. “This studies and the previous studies suggest that for a majority of people, there’s no long term harm from drinking coffee.”