2 c. flour
4 tbsp. cocoa
2 tsp. baking soda
1 c. cold water
Pinch of salt
1 c. sugar
1 tsp. vanilla
1 c. mayonnaise

Mix dry ingredients, add water, vanilla, and mayonnaise. Mix well; bake slowly, about 350 degrees in oblong pan for 30 minutes, or round pan for 35 minutes approximately. Test with toothpick.