Old-Fashioned Chocolate Mayonnaise Cake is a classic homemade dessert that proves you don’t need a long list of ingredients to make something delicious. With simple pantry staples like flour, sugar, cocoa powder, mayonnaise, and water, you can create a wonderfully moist chocolate cake with a soft texture and rich cocoa flavor.
Mayonnaise might seem like an unusual cake ingredient, but it works beautifully in chocolate baking. Made primarily from oil and eggs, mayonnaise adds richness and moisture without requiring separate butter and eggs in the batter.
This easy chocolate mayonnaise cake comes together in just minutes and bakes into a tender, satisfying dessert. Whether you’re preparing a simple family treat, bringing dessert to a gathering, or craving an old-fashioned chocolate cake, this recipe is one worth keeping.
Why You’ll Love This Old-Fashioned Chocolate Mayonnaise Cake
- Simple pantry ingredients: You only need six basic ingredients to prepare the cake.
- Moist, tender texture: Mayonnaise helps keep the cake soft and rich.
- Easy preparation: Mix the dry ingredients, add the mayonnaise and water, and bake.
- No separate eggs or butter needed: The mayonnaise provides the fat and egg components for the batter.
- Classic chocolate flavor: Unsweetened cocoa powder gives the cake its familiar chocolate taste.
- Perfect for everyday desserts: Enjoy it plain, dusted with powdered sugar, or topped with your favorite frosting.
What Is Chocolate Mayonnaise Cake?
Chocolate mayonnaise cake is an old-fashioned dessert that became popular because it uses mayonnaise as a convenient substitute for some traditional cake ingredients.
Mayonnaise contains oil and eggs, both of which contribute to the texture of baked goods. The oil helps keep the cake moist, while the emulsified mixture helps the batter come together smoothly.
When combined with cocoa powder, sugar, and flour, mayonnaise creates a soft chocolate cake without making the finished dessert taste like mayonnaise.
This version is especially simple because it uses water as the liquid and doesn’t require a separate frosting or filling.
Ingredients You’ll Need
All-Purpose Flour
Flour provides the structure for the cake. Measure it carefully to avoid adding too much, which can make the finished cake dry or dense.
Granulated Sugar
Sugar sweetens the cake and helps balance the slightly bitter flavor of unsweetened cocoa powder.
Unsweetened Cocoa Powder
Cocoa powder gives the cake its chocolate flavor and deep brown color. Use unsweetened cocoa rather than sweetened hot chocolate mix.
Baking Soda
Baking soda helps the cake rise, creating a softer texture. Measure it accurately for the best results.
Mayonnaise
Mayonnaise is the secret ingredient in this traditional recipe. Its oil and egg content help create a rich, moist crumb.
Use regular mayonnaise rather than a sweetened salad dressing. Reduced-fat mayonnaise may produce a different texture.
Water
Water brings the batter together and helps create a smooth consistency. Use room-temperature water for easy mixing.
How to Make Old-Fashioned Chocolate Mayonnaise Cake
Step 1: Prepare the Baking Pan
Preheat your oven to 350°F (175°C).
Grease a 9-inch square baking pan thoroughly, making sure to cover the bottom and sides. You can also line the bottom with parchment paper to make removing the cake easier.
Set the pan aside while you prepare the batter.
Step 2: Combine the Dry Ingredients
In a large mixing bowl, whisk together the all-purpose flour, granulated sugar, unsweetened cocoa powder, and baking soda.
Break up any lumps in the cocoa powder and make sure the baking soda is evenly distributed throughout the mixture. This helps the cake rise consistently.
Step 3: Add the Mayonnaise and Water
Add the mayonnaise and water to the dry ingredients.
Stir with a whisk or spatula until the batter is smooth and no large pockets of dry flour remain. Scrape the sides and bottom of the bowl as needed.
Avoid excessive mixing once the batter is combined, as overmixing can affect the cake’s texture.
Step 4: Transfer the Batter to the Pan
Pour the batter into the prepared 9-inch square baking pan.
Use a spatula to spread it evenly into the corners and smooth the surface.
Step 5: Bake the Cake
Place the pan in the preheated oven and bake for 30–35 minutes.
Check for doneness by inserting a toothpick into the center of the cake. If it comes out clean or with a few moist crumbs, the cake is ready.
If wet batter remains on the toothpick, continue baking for a few more minutes and check again.
Step 6: Cool Before Serving
Remove the cake from the oven and place the pan on a wire rack.
Allow the cake to cool before slicing. Cooling helps the crumb set and makes it easier to cut neat portions.
Serve plain or add your favorite topping.
Tips for the Best Chocolate Mayonnaise Cake
- Measure the flour correctly: Too much flour can make the cake heavy. Spoon it into the measuring cup and level the top.
- Use unsweetened cocoa powder: This provides a balanced chocolate flavor without adding extra sugar.
- Choose regular mayonnaise: Full-fat mayonnaise generally gives the cake its best moisture and richness.
- Whisk the dry ingredients thoroughly: Evenly distributed baking soda helps the cake rise properly.
- Don’t overmix the batter: Stir just until the ingredients are combined.
- Check the center for doneness: Oven temperatures vary, so begin checking around the 30-minute mark.
- Allow the cake to cool: Slicing too early can cause the soft cake to crumble.
- Avoid overbaking: Removing the cake once it is done helps preserve its moist texture.
Easy Ways to Customize This Cake
Add Vanilla Extract
Mix in 1 teaspoon of vanilla extract with the mayonnaise and water for extra aroma and flavor.
Make It More Chocolatey
Stir in ½ cup of chocolate chips before pouring the batter into the pan. They add little pockets of melted chocolate throughout the cake.
Add a Chocolate Frosting
Once the cake has cooled completely, spread it with chocolate buttercream or chocolate ganache for a richer dessert.
Dust with Powdered Sugar
For a simple presentation, lightly dust the cooled cake with powdered sugar just before serving.
Serve with Whipped Cream
A spoonful of lightly sweetened whipped cream pairs beautifully with the cocoa flavor and moist texture.
Add Chopped Nuts
Fold in ½ cup of chopped walnuts or pecans for a little crunch and a nutty flavor.
What to Serve with Chocolate Mayonnaise Cake
This cake is delicious on its own, but you can easily turn it into a more special dessert with a few simple additions.
- Vanilla ice cream: The cool, creamy texture contrasts beautifully with the chocolate cake.
- Fresh strawberries: Their natural sweetness and slight tartness complement the cocoa flavor.
- Whipped cream: Adds a light, creamy finish.
- Hot coffee: Pairs well with the deep chocolate flavor.
- Cold milk: A classic choice for a simple slice of chocolate cake.
- Chocolate sauce: Perfect for anyone who wants an extra-rich chocolate dessert.
How to Store Chocolate Mayonnaise Cake
Room Temperature: Store the unfrosted cake in an airtight container in a cool place for up to 2 days.
Refrigerator: Keep the cake in an airtight container for up to 5 days. Refrigeration can make the texture slightly firmer, so allow a slice to sit at room temperature briefly before serving.
Freezer: Wrap individual slices or the whole cooled cake tightly in plastic wrap, then place in a freezer-safe container. Freeze for up to 2 months for the best quality. Thaw overnight in the refrigerator or at room temperature until ready to serve.
If you add a perishable frosting or topping, follow the storage requirements for that topping.
Frequently Asked Questions
Does chocolate mayonnaise cake taste like mayonnaise?
No. The mayonnaise contributes moisture and richness, but its flavor is not noticeable in the finished chocolate cake. The cocoa powder and sugar provide the dominant flavors.
Why use mayonnaise instead of butter and eggs?
Mayonnaise already contains oil and eggs, so it can provide some of the fat and egg components normally used in cake recipes. This makes the recipe convenient while helping the cake stay moist.
Can I use Miracle Whip instead of mayonnaise?
Regular mayonnaise is recommended because it has a more neutral flavor. Miracle Whip and similar salad dressings often contain added sugar, vinegar, and seasonings that may change the taste of the cake.
Can I use Dutch-process cocoa powder?
Natural unsweetened cocoa powder is the safest choice for this recipe because baking soda works in conjunction with acidic ingredients. Dutch-process cocoa is less acidic and may affect how the cake rises.
How do I know when the cake is done?
Insert a toothpick into the center. It should come out clean or with a few moist crumbs, but no wet batter. The top should look set, and the edges may begin to pull slightly away from the pan.
Can I make this cake ahead of time?
Yes. Bake the cake a day ahead and let it cool completely. Store it covered in an airtight container until you’re ready to serve.
Can I make cupcakes with this batter?
The batter may be divided into lined muffin cups, but the baking time will be shorter than for a full cake. Begin checking for doneness after about 15–20 minutes, and continue baking as needed.
Can I add frosting?
Absolutely. Chocolate buttercream, vanilla buttercream, cream cheese frosting, or a simple chocolate glaze all work well. Make sure the cake is completely cool before adding frosting.
Old-Fashioned Chocolate Mayonnaise Cake Recipe
Prep Time: 10 minutes
Bake Time: 30–35 minutes
Total Time: 40–45 minutes, plus cooling time
Servings: 9–12 slices
Pan Size: 9-inch square baking pan
Oven Temperature: 350°F (175°C)
Ingredients
- 2 cups all-purpose flour
- 1 cup granulated sugar
- ⅓ cup unsweetened cocoa powder
- 1½ teaspoons baking soda
- 1 cup mayonnaise
- 1 cup water
Instructions
- Preheat the oven to 350°F (175°C). Grease a 9-inch square baking pan.
- In a large bowl, whisk together the flour, sugar, cocoa powder, and baking soda until evenly combined.
- Add the mayonnaise and water. Stir until the batter is smooth and well combined.
- Pour the batter into the prepared pan and spread it evenly.
- Bake for 30–35 minutes, or until a toothpick inserted into the center comes out clean or with a few moist crumbs.
- Remove the cake from the oven and place the pan on a wire rack.
- Let the cake cool before slicing and serving.
Final Thoughts
Old-Fashioned Chocolate Mayonnaise Cake is a wonderful reminder that simple ingredients can create a truly satisfying homemade dessert. Its moist texture, rich cocoa flavor, and easy preparation make it an excellent choice for busy days, family dinners, or last-minute baking.
Serve it plain for a simple treat, add frosting for a celebration, or pair it with vanilla ice cream for an easy dessert. Once you try this old-fashioned recipe, you may be surprised by just how delicious a cake made with mayonnaise can be.