Fresh roasted coffee is every coffee drinkers dream. Not every coffee drinker understands the process of how coffee is made, including the roasting process. To understand it a little better lets go through the basics.
Processing
A good coffee always starts with a good bean. This is where coffee starts to differentiate as far as brands are concerned. Some places use processors that will was the beans to remove the fruit of the bean and separate out the different densities of beans. Less dense beans will float to the top where they can be easily removed. Some use a slow dry process. Dry processed beans have a subtle acidity compared to the higher acidity of wet processed beans. The acidity level is what gives coffee its flavor. Without acidity it tastes flat. An important factor of good processing is that it should leave the bean with a good moisture content so that the flavors can develop in the roasting process.
Roasting
Roasting allows the beans to produce levels of acid, aroma and other flavors. The first stage of roasting turns a green bean into a yellow color and creates a smell similar to popcorn. When the next stage is reached, at 338F-392F, the sugar in the beans starts to caramelize. It is important that the sugars caramelize or the coffee will be too sweet once brewed. At 400F the next stage begins and the beans double in size and lighten in weight. The temperature will rise to 428F the bean reduce further in weight and release CO2. At 446F the beans become oily and there is usually a pop sound. This is a critical stage where the beans can be over roasted if the roaster is not careful. The oils and aroma start to boil off and combine with air if this is overdone then the beans will lose flavor and take on a burnt taste. Achieving a balance of bitterness, acidity and other characteristics is the goal in this final stage.
The Perfect Taste
Tasting guides will often use the term body to describe the kinds of proteins and fibers in the final brew of coffee. It refers to how the brew tastes on the roof of the mouth. It is determined by the roasting process. Too light of a roast will be too bitter, while too dark of a roast will take on the aforementioned burnt taste. Neither is considered the perfect roast. It should fall somewhere in the middle with a good balance. The type and brand of espresso maker can make a difference as well.
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August 22 2008 | coffee | No Comments »
In order to obtain the highest quality of roasting, it is essential that the beans were selected and dried with the utmost care and attention. Some producers will use a specific kind of wash. This wash is used to remove the flesh as well as separate the different kind of beans. Beans will float differently depending on their density. This makes it easier to determine which ones should be used and which ones should be removed. However, there are some producers who will use a more complex and time consuming method.
Dry processed beans usually provide the consumer with a less acidic product. Some acidity can be desired in certain blends but too much acidity can be a bad thing.
As beans heat up during the roasting process they produce different aromas and levels of acidity. They also will release their different flavor components. The first stage of roasting is when the beans absorb the heat. The beans will go from green to yellow and then from yellow to brown. Green does not necessarily mean a color but rather fresh or not yet roasted. Roasting when properly done will smell like popcorn or toast.
When the temperature is about 350 degrees Fahrenheit the sugars will caramelize. This is of course helped along by the increase in moisture temperature of the skin. Reaching the proper amount of caramelized sugars is important to develop a good brew during coffee roast.
Then at about 400 degrees Fahrenheit the beans should expand and reach about double what their original size was. They should also be light brown, but this can vary depending on what kind of beans are being used. They should also reduce in weight to about 5% less than their original weight. Then as the temperature continues to increase the beans will lose more weight and then release CO2. When the temperature hits about 450 degrees Fahrenheit, the beans should be a medium to dark brown and should be oily. Often there is a loud pop heard at this stage which is known as the second crack phase. This is where over roasting can occur and care and attention is necessary. Burnt taste can occur when the oils are boiled off and combine with the oxygen in the air. The goal is to have the perfect balance and combination of bitterness, acid, and a wide variety of different profile characteristics.
The body of a coffee is slightly misleading. It does not necessarily refer to the actual thickness of the coffee. In actuality it refers to the proteins and fibers that are found in the coffee. It specifically refers to the feeling on the tongue when it is rubbed against the roof of the mouth. It is fat content in the beverage that is largely controlled by the roasters and not the brewers. Unfortunately too light of a coffee will usually contain a bitterness in the final result. However, too dark a brew with sometimes produce too much of a chocolate tone with a burnt taste. Experimentation is the best way to find the coffee the best suits your desires without needing to go anywhere, even if it?s nearby.
About the Author:
Leroy Calstard writes for the most part for http://www.coffee-espresso-maker-tips.com , a website on espresso water pressure and home espresso machines. His contributions on
espresso maker are found on his website .
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August 11 2008 | coffee | No Comments »