Ingredients:
- 1 – 15.25 ounce vanilla (white) cake mix
- 1 1/4 cup water
- 1/2 cup + 2 tablespoons low-fat mayonnaise
- 4 egg whites
- 20 drops each food coloring; green, yellow, blue and red (for the divided batters)
- 12 ounces lite whipped topping (Cool Whip or store brand)