Option 1. Make the falafel mixture in the food processor. Do not add the baking powder. Refrigerate the processed falafel mixture in an airtight container for up to three days. Mix in the baking powder before forming the falafel. Option 2. Make the falafel mixture. Add the baking powder and form the falafel. Refrigerate the uncooked falafel in an airtight container for up to three days. The falafel will not be quite as fluffy and light in texture, but they will still cook well. Freezing: To freeze uncooked falafel, par-freeze the shaped falafel on a large flat surface with enough space between so they do not stick together. Then transfer them to a large freezer-safe bag or container. Thaw overnight before using, or cook them frozen.