Preheat oven to 350 degrees.
Add all cookie ingredients to a medium bowl until well combined. This will be a thick, sticky dough. Spray hands with cooking spray, divide dough and roll into 2 balls. Spray a cookie sheet lightly with non-stick spray. Shape (flatten slightly) into a thick, round cookie shape. Bake for approximately 8-10 minutes. Cool on a cooking rack. Frost and add sprinkles, if desired.
If you want to try the flavor before committing to a full size, you can use a Brownie Batter protein powder trial pack.
