2 Ingredient Pumpkin Brownies 1 (19.5 ounce) box brownie mix 1 (15 ounce) can pumpkin Directions: Preheat oven to 350 degrees F. Spray a 9×13 pan with nonstick cooking spray. In a large bowl, mix together brownie mix and pumpkin until combined. Pour batter into prepared pan and bake for 25-30 minutes, or until an inserted toothpick comes out clean.