I love Dr Pepper Cake because it has a soft, moist crumb and a deep chocolate flavor. The Dr Pepper adds a subtle fruity, spiced sweetness that blends beautifully with the cocoa without making the cake taste overwhelmingly like soda.
I also appreciate how simple this cake is to prepare. I can mix the batter using everyday pantry ingredients, pour it into a baking pan, and finish it with a warm chocolate frosting that spreads easily over the cake.
Another reason I enjoy this recipe is that it’s perfect for sharing. I usually bake it in a rectangular pan, which makes it easy to slice into generous squares. I especially love how the frosting settles over the warm cake and creates a smooth, fudgy topping.
Ingredients
(Tip: You’ll find the full list of ingredients and measurements in the recipe card below.)
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All-purpose flour
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Granulated sugar
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Unsweetened cocoa powder
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Baking soda
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Salt
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Dr Pepper soda
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Unsalted butter
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Vegetable oil
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Buttermilk
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Large eggs
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Vanilla extract
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Powdered sugar
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Whole milk
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Chopped pecans, optional
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Maraschino cherries, optional
I prefer using regular Dr Pepper rather than a diet version because the sugar contributes to the cake’s sweetness and texture. I also like using buttermilk for a tender crumb and unsweetened cocoa powder for a rich chocolate flavor.
Directions
I start by preheating my oven to 350°F (175°C). I lightly grease a 9-by-13-inch baking pan and set it aside.
In a large mixing bowl, I whisk together the all-purpose flour, granulated sugar, baking soda, and salt. I make sure the dry ingredients are evenly combined before adding the liquids.
Next, I place the Dr Pepper, butter, vegetable oil, and cocoa powder in a medium saucepan over medium heat.
I stir the mixture gently until the butter melts and the cocoa powder dissolves. I heat it until it is hot and smooth, but I don’t let it boil for an extended period.
I remove the saucepan from the heat and let the chocolate mixture cool for a few minutes.
In a separate bowl, I whisk together the buttermilk, eggs, and vanilla extract until smooth.
I slowly pour the warm chocolate mixture into the dry ingredients, stirring until the flour is mostly incorporated.
Next, I add the buttermilk and egg mixture. I whisk gently until the batter becomes smooth and evenly combined.
I avoid overmixing because I want the finished cake to have a soft, tender texture. I expect the batter to be thinner than a traditional butter cake batter.
I pour the batter into the prepared baking pan and spread it evenly.
I place the pan in the preheated oven and bake for approximately 30 to 35 minutes.
I check the cake by inserting a toothpick into the center. When it comes out clean or with a few moist crumbs, I know the cake is ready.
While the cake finishes baking, I prepare the chocolate frosting.
I melt butter in a saucepan over medium-low heat, then whisk in the cocoa powder and a splash of Dr Pepper or milk until smooth.
I remove the saucepan from the heat and gradually whisk in the powdered sugar and vanilla extract. I stir until the frosting becomes smooth and pourable.
If the frosting seems too thick, I add a little milk. If it seems too thin, I whisk in a bit more powdered sugar.
Once the cake comes out of the oven, I let it rest for approximately 5 to 10 minutes.
I pour the warm chocolate frosting over the cake while it is still slightly warm. I spread it gently with a spatula so it reaches the edges.
If I am using chopped pecans, I sprinkle them over the frosting before it sets.
I allow the cake to cool until the frosting becomes firm enough to slice. I then cut it into squares and serve it directly from the pan.
Servings and Timing
I usually get about 12 to 15 servings from one 9-by-13-inch Dr Pepper Cake.
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Prep time: 15 minutes
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Cook time: 30–35 minutes
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Cooling and frosting time: 30 minutes
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Total time: About 1 hour 20 minutes
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Servings: 12–15
Variations
For an Extra Chocolate Dr Pepper Cake, I fold semisweet chocolate chips into the batter before baking. I love how they create little pockets of melted chocolate throughout the cake.
When I want a nutty variation, I add chopped pecans or walnuts to the frosting. I find that the crunchy nuts contrast beautifully with the soft chocolate cake.
For a Cherry Dr Pepper Cake, I add finely chopped maraschino cherries to the batter and decorate the finished cake with a few extra cherries. I enjoy how the cherry flavor complements the soda’s fruity notes.
I sometimes make a cream cheese frosting instead of the traditional chocolate glaze. I like the slight tanginess of cream cheese against the sweet chocolate cake.
For a more pronounced soda flavor, I replace some of the milk in the frosting with Dr Pepper. I find that this adds a subtle caramel-like sweetness without changing the cake’s texture.
When I want individual portions, I divide the batter among lined muffin cups and bake them as cupcakes. I start checking for doneness after approximately 18 minutes and adjust the baking time as needed.
Storage/Reheating
I allow the Dr Pepper Cake to cool completely before covering the baking pan or transferring slices to an airtight container.
I store the cake at room temperature for up to 2 days in a cool, dry place. For longer storage, I refrigerate it for up to 5 days.
I find that the cake stays pleasantly moist when it is tightly covered. I prefer keeping the frosting intact rather than stacking the slices directly on top of one another.
For freezing, I wrap individual cake squares tightly and place them in a freezer-safe container. I freeze them for up to 3 months and thaw them in the refrigerator or at room temperature before serving.
When I want a warm slice, I microwave it for approximately 10 to 15 seconds. I enjoy how the gentle warmth softens the chocolate frosting.
I avoid overheating because it can dry out the cake and cause the frosting to melt excessively.
FAQs
Can I taste the Dr Pepper in the cake?
I notice a subtle fruity, caramel-like sweetness rather than a strong soda flavor. I find that the Dr Pepper enhances the chocolate and adds depth, while the cocoa remains the dominant flavor.
Can I use Diet Dr Pepper instead?
I prefer regular Dr Pepper because its sugar contributes to the flavor and texture of the cake. I can experiment with Diet Dr Pepper, but I expect the sweetness and finished texture to be slightly different.
Why is my Dr Pepper Cake dry?
I find that overbaking is one of the most common reasons for dry cake. I begin checking for doneness near the end of the recommended baking time and remove the cake when a toothpick shows a few moist crumbs.
Can I make Dr Pepper Cake ahead of time?
Yes. I often bake the cake a day before serving because it stays moist and the chocolate flavor develops nicely. I keep it covered and add any decorative toppings shortly before serving.
Can I make Dr Pepper Cake without buttermilk?
Yes. When I don’t have buttermilk, I make a substitute by adding a little lemon juice or white vinegar to regular milk and letting it stand for approximately 5 to 10 minutes. I use this mixture in the batter to help maintain a tender texture.
Conclusion
Dr Pepper Cake is a moist, chocolatey dessert with a subtle fruity sweetness and a rich, fudgy frosting. I love how easily it comes together and how well it works for sharing at gatherings. It’s a comforting homemade cake that I enjoy making whenever I want a simple chocolate dessert with a distinctive twist.
