Mayonnaise Cake
["2 c. flour", "1 c. sugar", "1 tsp. baking powder", "1 tsp. baking soda", "2 tsp. vanilla", "2 egg yolks", "1 c. warm coffee", "5 Tbsp. cocoa", "1 c. mayo"]
["Mix all ingredients and bake in a greased cake pan for 35 to 40 minutes at 375\u00b0."]
["flour", "sugar", "baking powder", "baking soda", "vanilla", "egg yolks", "warm coffee", "cocoa", "mayo"]