Post Roasting: Coffee Griniding
Abraham Lincoln is known to have quipped “If this is coffee, then please bring me some tea. But if this is tea, please bring me some coffee.” Strong, light or decaffeinated- however you like it; espresso, cappuccino, latte or mocha- however you call it, one cannot simply start a day without that hot mug of coffee done in a coffee grinders.
But did you know that the cup of coffee with its rich taste lingering in your taste buds has reached your table after a rather meticulous process?
What happens after Coffee is Roasted?
The following are the steps involved in the preparation of coffee:
1. Roasting of green coffee beans
2. Grinding of the roasted beans
4. Filtration of brewed coffee from the residue of ground beans
Here in this article, you will get to know all about the grinding process of roasted coffee beans.
Grinding of the roasted beans
Any connoisseur of this wonder beverage would vouch for the pleasantness of grinding the beans just before brewing the coffee. However, the grinding or milling process is painstakingly intricate and the taste of the coffee is largely dependent on how the beans are ground. There are various methods of grinding the coffee beans. Depending on how coarse or medium or fine the ground powder is desired, one should select the method of grinding.
Coffee beans can be milled using blade grinders or blenders that are handy for grinding for any type of brewing except for Espresso, French press or Turkish. These blade grinders come with special blades for grinding coffee beans and rotate at a high speed of approximately 20,000 rpm.
The blade grinders are simple to use and hence the best for domestic grinding.
The blade grinders are rather inexpensive.
On the downside, the ground particles lack uniformity and hence makes the process of brewing difficult.
Continuous use of the grinders can over heat the blades and can result in over-bitterness of the coffee at the time of brewing.
The blade grinders are very noisy and can grind only a small batch of beans at a time.
Burr grinders have two abrasive wheels between which the coffee beans are ground as a result of the heating caused by the friction of the wheels. The fineness of the powder depends on the space between the two wheels. The closer they are set, the finer the ground material is. Hence, this type of milling can be used for a variety of brewing other than Turkish which requires the ground matter to be almost powdery.
The burr grinders produce an unmatched quality of uniform grinding, which makes the process of brewing easier.
These grinders help extract the oils from the coffee beans that adds to the taste and aroma of the beverage.
The most noteworthy feature of the burr grinders is its versatility. The grinder can be set in any way to give the desired results.
Roller grinders use two uneven rollers between which the coffee beans are ground. Overheating due to the friction between the rollers can cause extra bitterness in the coffee. To deal with this, it has a water cooler attached.
The roller grinders produce an evenly ground powder and can be used for any type of brewing, including Turkish.
Roller grinders are expensive and are most commonly used for commercial production.
A large quantity of coffee beans can be grounded at a time.
Grinding with pestle and mortar
Pounding the roasted coffee beans with a mortar and pestle is one of the most conventional methods of grinding. It can produce a very fine powdery texture which is essential for Turkish brewing.
A fine powder of this quality cannot be made even with the burr grinders.
However, pounding with the mortar and pestle requires substantial manual efforts.
It is time consuming and can grind only a little at a time.
Based on the taste preferences, convenience and scale of requirement, one can select the suitable method of grinding. Coffee beans of different places have different flavours. Also, coffee beans have to be packed in time after they are roasted.
You would love your coffee more after this. The perfect coffee beans are quality checked to ensure that they meet all the requirements before they are dispatched to the market, and often this is what determines the quality of coffee that you eventually drink.
Remember, a cup of coffee is not just any beverage but a phenomenon and as we often hear it, “Coffee is always a good idea!”