1-1/2 c. unsifted flour
3/4 c. sugar
1 tsp. baking soda
1/4 tsp. salt
2/3 c. strong coffee
1/2 c. real mayonnaise
1/3 c. chocolate syrup
1 tbsp. vinegar
1 tsp. vanilla

In an 8x8-inch baking, mix first 4 ingredients. Add remaining ingredients; stir.

Bake at 350°F for 30 to 35 minutes.