Super Moist Chocolate Mayo Cake - cooking recipe

Ingredients

1 (21 1/2 ounce) box chocolate cake mix (I use Duncan Hines)
1 cup mayonnaise
1 cup water
3 eggs
1 teaspoon ground cinnamon (optional)

Preparation

Preheat oven to 350*F.
Blend all ingredients.
Bake as directed on cake mix box.