Chocolate Mayonnaise Cake

Chocolate mayonnaise cake is a dense, moist chocolate cake that has rich chocolate flavor.

Course Dessert

Cuisine American

Prep Time 15

Cook Time 25

Total Time 40

Servings pieces

Calories 205kcal

Preheat oven to 350F. Grease and flour a 9x13-inch baking pan.
Stir hot water and cocoa powder together in a small bowl. Set aside.
⅔ cup unsweetened cocoa powder, 1 cup hot water
Using an electric hand or stand mixer, beat the eggs, sugar, and vanilla in a large bowl on high speed until thick and very light yellow in color; about 5-6 minutes.
3 large eggs, 1 ⅔ cups granulated sugar, 1 tablespoon vanilla extract
Add the mayonnaise, and beat on medium speed until combined.
1 cup mayonnaise
Add the cocoa mixture, flour, baking powder, baking soda, and salt, and mix in until combined. The mixture will look thick and fudgy.
2 cups all-purpose flour, 1 ¼ teaspoon baking soda, ¼ teaspoon baking powder, ¼ teaspoon salt
Add the buttermilk, and mix on low speed just until it's incorporated.
⅓ cup buttermilk
Pour the batter into the prepared pan.
Bake for about 30-40 minutes, or until a toothpick inserted in the middle comes out clean.
Allow the cake to cool in the pan until it reaches room temperature.
Frost with desired frosting.

Hot water: Hot coffee can also be used in place of the hot water.
Mayonnaise: I've used both lighter (olive oil) mayonnaise and full-fat mayonnaise in this cake. Both have worked equally well.
- I like to use real mayonnaise, not Miracle Whip, as Miracle Whip has a stronger flavor.
Buttermilk: To make your own homemade buttermilk substitute, you can use this recipe.
Nutrition values are estimates.