Mayonnaise Cake
["3 c. flour", "1 1/2 tsp. vanilla", "3 tsp. baking soda", "6 Tbsp. cocoa", "1 1/2 c. mayonnaise", "1 1/2 c. cold water"]
["In a bowl, mix together all ingredients.", "Pour into a greased and floured 9 x 13-inch cake pan. Bake in a preheated 375\u00b0 oven for 45 minutes or until toothpick or knife put into center of cake comes out clean."]
["flour", "vanilla", "baking soda", "cocoa", "mayonnaise", "cold water"]