Mayonnaise makes this cake nice and moist.
1 Preheat oven to 350 degrees F (175 degrees C). Grease and flour two 8 or 9 inch round cake pans.
2 Sift all-purpose flour, salt, baking soda, and cocoa together.
3 Whip mayonnaise, white sugar, cold water, and vanilla together until mixed thoroughly. Add flour mixture slowly and beat at medium speed of an electric mixer for 2 minutes. Pour batter into prepared pans.
4 Bake at 350 degrees F (175 degrees C) for 20 to 25 minutes. Frost with your favorite frosting.