2 1/4 c. flour
2/3 c. instant dry milk
1/3 c. + 2 tsp. sugar
1/4 c. cocoa
1 tsp. baking powder
1 tsp. baking soda
1 c. water
3/4 c. buttermilk
1/2 c. reduced calorie mayo
1 tsp. vanilla extract

Preheat oven to 375 degrees. Spray 16" x 12 3/4" sheet pan; set aside. Beat batter, pour into pan. Bake 20 minutes until comes away from pan. Remove cake from pan after 5 minutes, cool on wire rack. Makes 12 servings.