1/2 c. sugar
1 c. mayonnaise or salad dressing
2 c. flour, sifted
3 tbsp. cocoa
2 tsp. vanilla
2 tsp. baking soda
1 c. warm water
1/2 tsp. salt

Mix all ingredients together. Beat hard for 2 minutes. Bake in oblong 13"x9" greased and floured pan at 350 degrees for 30 minutes.