Easy fool-proof brownie mix cookies. Ingredients 1 box brownie mix 2 eggs ¼ cup vegetable oil ⅛ cup all-purpose flour Instructions Preheat oven to 350 degrees. Add all of the ingredients to a bowl and mix well. Roll small balls of dough and space out on a lined cookie sheet. Bake for approximately 10-15 minutes. Cool cookies for a few minutes before placing on a wire rack. 3.4.3177