2 1/2 cups all purpose flour
2 cups sugar
3/4 cup cocoa
1 tsp. salt
2 tsp. baking soda
1/2 cup plus 2 tbsp. mayonnaise
2 tbsp. vinegar
2 tsp. vanilla
2 cups cold water

Combine all ingredients in a large bowl. Beat until smooth about 3 minutes.

Bake at 350°F for 40 minutes in greased and floured 9 x 13 inch pan.

FROSTING:

1 stick butter
1 egg
6 oz. semi sweet chocolate chips, melted

Beat butter and egg well. Add melted chocolate chips. Beat until smooth. Apply to cooled cake.