Chocolate Mayonnaise Cake - cooking recipe

Ingredients

2 c. flour
1 c. sugar
1 1/2 tsp. baking powder
1 1/2 tsp. soda
4 Tbsp. cocoa
1 tsp. vanilla
1 c. mayonnaise
1 c. water
1 recipe chocolate buttercream frosting

Preparation

Mix
all
ingredients
in
one\tbowl
and
beat with an electric mixer until well blended.\tPour batter into a greased and floured
9\tx
13-inch
cake
pan.\tBake
at
350\u00b0 until a toothpick pressed into the cake's center comes out clean.
Top the cake with chocolate buttercream frosting while it is still hot.