Whole flax seeds can be ground or powdered by buzzing them in a blender or coffee grinder. Breaking down the hard outer shell of the seed makes it easier to digest. Grind seeds coarsely or into a fine powder, depending on how you plan to use them.
Ground seeds can be blended into baked goods for added nutrients and texture. Powdered flax seeds can be incorporated into foods like shakes or used as a nutritious thickening agent. Vegans can use a blend of 1 tbsp. milled flax seed and 3 tbsp. water as an equivalent to one egg.
Ground flax seeds can be used in baking, but grind seeds as needed. Once seeds are ground or powdered and exposed to air, they begin to oxidize or break down, losing some of their nutritional value. The Flax Council of Canada suggests storing coarsely ground flax seeds in a sealed container at room temperature for up to 10 months. Powdered or finely ground flax seeds should be kept in the refrigerator or freezer.