Chocolate Mayonnaise Cake
["2 cups flour", "1 cup sugar", "1-1/2 tsp baking soda", "pinch of salt", "4 Tbsp cocoa", "3/4 cup mayonnaise", "1 cup cold water", "1 tsp vanilla"]
["Mix dry ingredients with liquid ingredients until well mixed and smooth. Bake 30 to 40 minutes at 350."]
["flour", "sugar", "baking soda", "salt", "cocoa", "mayonnaise", "cold water", "vanilla"]