How To Grind Coffee beans at home and Without A Grinder 1- blender: blender is a suitable replacement for a coffee grinder in a pinch. The blade of the blender chops the coffee in the same way as a blade grinder. It will never be as consistent as a burr grinder 2- Mortar and pestle: Mortar and pestle have been used by pharmacists and cooks for centuries to grind herbs, spices, and medicines into a fine powder. 3- Hammer: hammer can easily crush your beans - as well as your hand or kitchen counter, so use it with care 4- knife: The best way to grind your grains with a knife is to use the flat of the blade, not the edge 5- bonus: 3 other simple methods