Actually, brewing coffee involves both physical and chemical changes. From coffee beans to a cup of coffee, it requires both types of changes. Normally in grinding, wetting, filtering etc., physical changes take place. On the other hand, chemical changes take place in the extraction phase. With both types of changes, you can get a yummy […]

All you have to do is put them somewhere still, then pressure hard with something tough until they turn into coffee grounds. You can do it through mortar & pestle, rolling pin, or through hammer and towel. However, the most suitable and effective way is to put in a blender machine and grind your beans. […]