Indulge in a timeless Southern classic with our Chocolate Mayonnaise Sheet Cake. This deeply rich and incredibly moist chocolate cake is generously crowned with a thick, luscious layer of homemade chocolate cream cheese icing. It’s an old-fashioned favorite that promises a delightful sweet ending to any meal, bringing comfort and joy with every bite.

Unlocking the Secret to Unmatched Moisture: The Mayonnaise Magic
For many, the idea of adding mayonnaise to a cake batter might seem unconventional, but it’s a time-honored baking secret, especially prevalent in Southern kitchens. Mayonnaise, being a rich emulsion of oil and eggs, introduces an unparalleled level of moisture and tenderness to baked goods. It acts as a dual-purpose ingredient, negating the need for separate oil and eggs, while ensuring a cake that’s incredibly tender and never dry. The beauty of it? You won’t taste the mayonnaise at all; it simply contributes to the cake’s sublime texture and deep, satisfying richness.
This particular Chocolate Mayonnaise Sheet Cake offers all the charm and flavor of traditional mayonnaise cakes, like the famous Duke’s Chocolate Mayonnaise Cake, but in a much simpler and more shareable sheet cake format. Its ease of preparation and ability to feed a crowd make it an instant hit for potlucks, family gatherings, or casual cookouts. Get ready for rave reviews and requests for the recipe!
A Glimpse into History: The Enduring Appeal of Mayonnaise Cakes
Mayonnaise cakes gained significant popularity during the 1930s Depression era, when ingredients like eggs and butter were scarce or expensive. Bakers creatively found that mayonnaise served as an excellent substitute, providing the necessary fat and binding agents. This resourceful baking trend saw a resurgence in the 1970s and has since remained a beloved staple in many households, particularly across the American South. Our Chocolate Mayonnaise Sheet Cake proudly carries on this tradition, delivering a dense, moist, and intensely chocolatey experience that harkens back to simpler times yet delights modern palates.

Perfecting Your Chocolate Mayonnaise Sheet Cake: Expert Tips
Creating the perfect Chocolate Mayonnaise Sheet Cake is straightforward, but a few key tips can elevate your baking from good to extraordinary.
The Role of Spices: Cinnamon’s Subtle Touch
Our recipe includes a touch of cinnamon, which beautifully enhances the chocolate flavor, adding a subtle warmth and complexity that many adore. Cinnamon and chocolate are a classic pairing, often found in gourmet desserts. However, if you prefer your chocolate pure and unadulterated, or if cinnamon isn’t to your taste, feel free to omit it. The cake will still be wonderfully delicious without it.
Choosing Your Mayonnaise: Quality Matters
Since mayonnaise is a central ingredient, selecting a quality brand can make a difference in the final product. Brands like Duke’s Mayonnaise are celebrated for their rich, creamy texture and balanced flavor profile, making them a top choice for Southern bakers. Hellmann’s (or Best Foods west of the Rockies) is another excellent and widely available option that yields fantastic results. Opt for a full-fat, traditional mayonnaise for the best texture and flavor contribution.
The Hot Water Advantage: Blooming the Cocoa
One crucial step in this recipe is the addition of hot water to the batter. This isn’t just about adding liquid; it’s about “blooming” the cocoa powder. Hot liquids help release the full flavor and deep color of cocoa powder, intensifying the chocolate experience. Furthermore, this technique contributes significantly to the cake’s moistness, ensuring a tender crumb that resists dryness. Don’t skip this step!
Storage and Freshness
For optimal freshness and to maintain its delightful texture, this cake should be refrigerated if it’s not consumed on the day it’s baked. Storing it in an airtight container will keep it moist and delicious for several days. Bring it to room temperature before serving for the best flavor and texture.

More Irresistible Sheet Cake Recipes to Explore
If you’ve fallen in love with the convenience and deliciousness of sheet cakes, you’re in luck! There’s a whole world of delightful sheet cake recipes waiting to be discovered. These easy-to-make desserts are perfect for any occasion, from casual weeknight treats to festive celebrations.
- White Texas Sheet Cake: A lighter, equally delicious alternative.
- Peanut Butter Sheet Cake: For the ultimate peanut butter and chocolate lover.
- Chocolate Zucchini Sheet Cake: A surprisingly moist and flavorful way to enjoy your veggies.
- Texas Sheet Cake with Peanut Butter Frosting: A classic with a nutty twist.
- Pineapple Sheet Cake: A tropical delight that’s bright and refreshing.
Chocolate Mayonnaise Sheet Cake
15 minutes
30 minutes
16
Equipment
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Baking spray with flour
Ingredients
Cake Batter
- 2 cups all-purpose flour
- 2/3 cup unsweetened cocoa powder
- 1 teaspoon baking soda
- 1/2 teaspoon cinnamon
- 1/4 teaspoon salt
- 1/4 teaspoon baking powder
- 3 large eggs
- 1 2/3 cups packed light brown sugar
- 2 teaspoons vanilla extract
- 1 cup mayonnaise
- 1 1/3 cups hot water
Frosting
- 1 (8-ounce) package cream cheese, , softened
- 1/2 cup butter, , softened
- 2 teaspoons vanilla extract
- 1/2 cup unsweetened cocoa powder
- 4 1/2 to 5 cups powdered sugar
- 2 tablespoons heavy cream
Instructions
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1. Preheat oven to 350 degrees F (175 degrees C). Prepare a 9×13-inch baking pan by spraying it thoroughly with baking spray that contains flour.
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2. In a medium bowl, whisk together the dry ingredients: all-purpose flour, cocoa powder, baking soda, cinnamon (if using), salt, and baking powder. Set this mixture aside.
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3. Using an electric mixer, beat the eggs, packed light brown sugar, and vanilla extract together at medium-high speed for a full 3 minutes, until light and fluffy.
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4. Reduce the mixer speed to low. Carefully add the mayonnaise and beat just until it is fully incorporated into the mixture. Do not overmix.
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5. Begin adding the dry flour mixture and hot water to the batter alternately. Add the flour mixture in three additions and the hot water in two additions, beating lightly after each addition just until combined before adding the next. This ensures a smooth, well-blended batter.
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6. Pour the prepared cake batter evenly into your greased 9×13-inch pan. Bake for 30 to 35 minutes, or until a wooden skewer or toothpick inserted into the center comes out clean.
Allow the cake to cool completely on a wire rack before you begin frosting it.
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7. To prepare the decadent chocolate cream cheese frosting, beat the softened cream cheese, softened butter, and vanilla extract with an electric mixer until the mixture is light, fluffy, and perfectly creamy.
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8. In a separate bowl, whisk together the unsweetened cocoa powder and powdered sugar until well combined.
Gradually beat half of this cocoa-sugar mixture into the cream cheese and butter mixture until smooth.
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9. Beat in the heavy cream, then add the remaining powdered sugar and cocoa mixture. Continue beating until the frosting is smooth and spreadable. If the frosting appears too thick, you can add a little more heavy cream, one teaspoon at a time, until you reach your desired consistency.
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10. Once the cake is completely cool, spread the luscious chocolate cream cheese frosting evenly over the top. Slice and serve!
Video
Notes
Nutrition
Nutrition information is automatically calculated and should only be used as an approximation. It can vary based on specific ingredient brands and preparation methods.
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Recipe adapted from MyRecipes.com