Coffeeclues

Coffee is a drink that is prepared from roasted coffee beans. This articles tries to explain about the two important steps involved in processing of green beans coffee.

Green Beans Coffee- Roasting
Roasting: It is the most important step in coffee processing. Coffee can be home roasted also. Roasting process determines the taste of the final brew. Roasting causes a change in the chemical and physical properties of the bean. There is a decrease in the weight of the bean due to loss of moisture and the bean becomes less dense. Density influences the beans strength. Roasting process actually starts when the temperature is about 200 degrees.

What Actually Happens During Roasting
Due to the presence of intense heat, starches get converted to simple sugars and beans tend to turn to brown color. Sucrose generally disappears and acids, aromatic acids weaken thereby causing the change of flavor. Certain other oils such as caffeol develop and these oils are responsible for the taste of the coffee.

Grading Coffee Roasts
Green beans after roasting are graded as light, medium and dark roasts. Darker roasts generally have less content of fiber and more sugar. Light roasts have higher levels of caffeine content in it and strong flavor due to aromatic oils.

Green Coffee Beans- Brewing
Once roasting has been been carried out, beans are grounded and brewed. Brewing is of different types.

• Coffee brewing by boiling is one of the oldest method. In this process, water is added to coffee powder and boiled for an instant. It produces coffee with a foamy layer on the surface. Sediments generally remain at the bottom.
• Automatic coffee makers and percolators help to brew coffee under gravity. In this method, water flows into the coffee filter containing coffee powder. The water carries all the oils as it seeps down and is finally collected into a pot.