2 c. plain flour
1 c. sugar
1 tsp. baking soda
1 1/2 tsp. baking powder
4 tsp. cocoa
1 c. mayonnaise
1 c. cold water
2 tsp. vanilla

Mix together first 5 ingredients, then sift. Add rest of ingredients. Mix well and bake in greased square pan for 30-35 minutes at 350 degrees. Start mixing frosting when cake has baked for 15 minutes.

FROSTING:

1 c. granulated sugar
1/4 c. cocoa
1/4 c. milk
1/4 c. butter