In a large mixing bowl whisk flour, hemp seeds (if using), baking soda, salt, and cinnamon.
Bake for 20 minutes or until muffins are set and lightly golden. I like to check them every 5 minutes so they don’t burn.
Do not open the oven while these are baking or they may flop!
Freeze in airtight containers or freezer zip lock bags. They will keep for a few months.