How to Grind Flax Seed: 6 Options Including Mortar and Pestle
6. Mortar and Pestle. If you have none of the above, and you don''t plan to invest in any of them, one simple way is to go old fashioned. Use a mortar and pestle to grind your flax seeds. It will hardly cost you anything and will be a good alternative to all of the above methods.