1. Grinding principle of coffee beans
1. Choose the grinding degree suitable for the brewing method.
2. The temperature generated during grinding should be low.
3. The powder after grinding should be uniform.
4. Grind before brewing.
Second, the grinding classification of coffee beans
According to its size, it can be divided into three types: coarse grinding, medium grinding and fine grinding. Use the appropriate grinding method depending on the coffee maker.
There is also a medium-fine grind or a very fine grind (powdered coffee) that is finer than a fine grind. The grinding time of coffee beans is before brewing coffee, and only the required amount is ground and top grade. After coffee beans are ground into powder, their surface area increases and absorbs moisture and is easily oxidized. In short, the coffee powder also acts as a deterioration over time and the flavor is impaired.
And after the ground coffee beans are placed, the carbon dioxide retained in the coffee beans will be lost together with the aroma. In this way, the coffee powder should not expand when the filter is extracted, and no coffee can be brewed no matter what. The secret is to consider grinding and working consistently, so that the coffee brewed in this way is the most delicious and mellow.
Three, Coffee Bean Grinding Method
1. Use a mortar and pestle. The best thing to do is to start with just a few beans at a time, otherwise the beans may fly out of the mortar. After practice makes perfect, increase the amount of ground coffee beans. Slowly grind the coffee beans into powder, this method requires you to be very patient.
2. Hammer with a hammer. This method is the easiest. Put the beans in a good quality plastic bag or parchment paper, or wrap in a towel. In this way, the size of the coffee beans may be inconsistent, and you need a very careful hammer.
3. Grind with a rolling pin. Using a rolling pin is similar to using a hammer. Wrap in a ziploc bag or in parchment paper and a thin towel, crush the beans with enough force, rolling back and forth until the powder is the thickness you want. If you don’t have a rolling pin, a sturdy food bottle or can will work as a grinding tool.
4. Use an old hand grinder or grinder.
5. Use a blender. A blender is an incredible tool for grinding coffee beans into powder in no time.
