Ingredients

2 C. flour
1 ½ tsp. baking soda
1 C. sugar
½ C. baking cocoa
¾ C. mayonnaise
1 C. cold water
1 tsp. vanilla

Method

1. Sift together flour, sugar, soda and cocoa into a mixing bowl.
2. Add the remaining ingredients and beat until smooth.
3. Put batter in a 9×13 cake pan.
4. Bake at 350 for 35 min.