Preheat oven to 350 and line a square, 8x8 baking pan with foil. Spray the foil with nonstick cooking spray. Set aside.
Add cake mix, oil, eggs and flavor (if using) to a mixing bowl and mix well. Pour batter into prepared pan and spread evenly.
Bake for 15-17 minutes or just until the edges begin to brown. Remove from oven and cool completely in pan. Remove from pan and peel away foil. Cut into 9 squares.
Icing Directions:
Add powdered sugar and milk in a small bowl and mix well. Place into a resealable sandwich bag and snip the tip. Drizzle onto brownies and sprinkle with valentine sprinkles. Let set for icing to harden a bit.