Preheat oven to 350˚F, and butter a brownie pan.
In a processor, process together cashew butter, applesauce, granulated sugar, beans, and flax seeds with water. Transfer to a mixing bowl.
Mix in vanilla, salt, oat flour, and baking powder.
Add chocolate chips and/or other add-ins.
Bake for about 35-40 minutes, until the top cracks and browns slightly. Allow to cool completely before cutting. (Note: taste best at room temperature the next day.) Recommend storage in the fridge if keeping >1 day because of the beans.