Preheat oven at 350 degrees.
Mix chocolate cake mix, pudding mix, milk, oil and eggs on medium speed until fully incorporated.
Add mayonnaise and mix thoroughly.
Depending on the type of baking pan you're using, review the suggested baking times on the back of the box and bake your cake.
Let cake cool completely before icing.
Serving Size 1
Servings 0
* Percent Daily Values are based on a 2,000 calorie diet. Your daily value may be higher or lower depending on your calorie needs.