Dirty Soda Tres Leches Cake

Homemade Dirty Soda Tres Leches Cake Recipe

Important Note

This is an independent homemade copycat recipe inspired by the flavor profile of Crumbl’s Dirty Soda Tres Leches Cake. It is not the official Crumbl recipe. Ingredient brands, sweetness, texture, and final appearance may vary depending on preparation.

This chilled dessert combines a moist chocolate cake, a creamy cola-inspired tres leches soak, coconut-lime whipped topping, and a fresh lime garnish. The recipe creates a rich yet refreshing dessert that works well for parties, family gatherings, and special occasions.

Recipe Overview

• Preparation time: 25 minutes
• Baking time: 25–30 minutes
• Chilling time: At least 4 hours
• Total time: About 5 hours
• Servings: 9–12 slices

Ingredients

For the Chocolate Cake

• 1 cup all-purpose flour
• ¾ cup granulated sugar
• ⅓ cup unsweetened cocoa powder
• 1 teaspoon baking powder
• ½ teaspoon baking soda
• ¼ teaspoon salt
• 1 large egg
• ½ cup buttermilk
• ⅓ cup neutral vegetable oil
• ½ cup cola
• 1 teaspoon vanilla extract
• ½ teaspoon coconut extract, optional

For the Dirty Soda Tres Leches Soak

• ½ cup sweetened condensed milk
• ½ cup evaporated milk
• ⅓ cup heavy cream
• 3 tablespoons cola
• 1 tablespoon fresh lime juice
• ½ teaspoon vanilla extract
• ¼ teaspoon coconut extract

For the Coconut-Lime Whipped Cream

• 1 cup cold heavy whipping cream
• 3 tablespoons powdered sugar
• ½ teaspoon coconut extract
• 1 teaspoon finely grated lime zest
• 1 teaspoon fresh lime juice

For Garnishing

• Fresh lime slices or lime wedges
• Finely grated lime zest
• Chocolate cake crumbs, optional
• A light drizzle of cola syrup, optional

Instructions

1. Prepare the Baking Pan

Preheat the oven to 350°F or 175°C.

Lightly grease an 8-inch square baking pan and line the bottom with parchment paper. This preparation helps the cake release cleanly after chilling.

2. Mix the Dry Ingredients

Add the flour, sugar, cocoa powder, baking powder, baking soda, and salt to a large mixing bowl.

Whisk the ingredients until the cocoa powder is evenly distributed and the mixture looks smooth.

3. Add the Wet Ingredients

Add the egg, buttermilk, vegetable oil, cola, vanilla extract, and optional coconut extract.

Whisk until the batter becomes smooth and evenly combined. Avoid overmixing so the cake keeps a soft and tender texture.

4. Bake the Chocolate Cake

Pour the batter into the prepared pan and spread it evenly.

Bake for 25–30 minutes, or until a toothpick inserted near the center comes out with a few moist crumbs.

Allow the cake to cool in the pan for approximately 20 minutes.

5. Make the Tres Leches Soak

In a medium bowl, combine the sweetened condensed milk, evaporated milk, heavy cream, cola, lime juice, vanilla extract, and coconut extract.

Whisk until the mixture becomes smooth and fully blended.

The cola adds a gentle soda-inspired flavor, while the lime and coconut create the classic dirty-soda profile.

6. Soak the Cake

Use a skewer, fork, or toothpick to create small holes across the surface of the warm cake.

Slowly pour the tres leches mixture over the cake. Add the liquid gradually so it absorbs evenly instead of collecting around the edges.

Cover the pan and refrigerate the cake for at least 4 hours. Overnight chilling creates an even softer and more flavorful texture.

7. Prepare the Coconut-Lime Whipped Cream

Add the cold heavy whipping cream and powdered sugar to a chilled mixing bowl.

Beat with an electric mixer until soft peaks begin to form.

Add the coconut extract, lime zest, and lime juice. Continue mixing until the whipped cream holds medium peaks.

Avoid overmixing, as a smooth and fluffy texture works best for this dessert.

8. Decorate the Cake

Spread the coconut-lime whipped cream evenly over the chilled cake.

Add fresh lime zest, lime slices, and optional chocolate cake crumbs.

For an extra cola-inspired finish, add a very light drizzle of cola syrup immediately before serving.

9. Chill and Serve

Return the decorated cake to the refrigerator for approximately 30 minutes.

Serve the cake chilled for the creamiest texture and strongest coconut-lime flavor.

How to Make Cola Syrup

Add ½ cup cola to a small saucepan and simmer over low heat.

Allow it to reduce until approximately 2 tablespoons remain. Let the syrup cool completely before drizzling it over the whipped topping.

Use only a small amount, as reduced cola has a concentrated sweetness.

Helpful Recipe Tips

Use full-fat dairy products for a richer tres leches texture.

Pour the milk mixture over a warm—but not piping-hot—cake so it absorbs smoothly.

Keep the whipped cream and mixing bowl cold before whipping.

Add lime juice gradually because too much acidity can overpower the coconut and chocolate flavors.

Allow the cake to chill overnight when possible for a softer and more balanced result.

Storage Instructions

Cover the cake tightly and refrigerate it for up to 3 days.

Keep the dessert chilled because it contains dairy-based soaking liquid and whipped cream.

For the freshest presentation, add the lime slices shortly before serving.

Freezing is not recommended after adding the whipped topping because the texture may become watery after thawing.

Frequently Asked Questions

Can I use a boxed chocolate cake mix?

Yes. A chocolate cake mix can save preparation time. Prepare it according to the package directions and replace part of the liquid with cola for a mild soda-inspired flavor.

Does the cake taste strongly like cola?

The cola flavor remains subtle. It supports the chocolate, coconut, and lime flavors without making the dessert taste like a glass of soda.

Can I make this recipe without coconut extract?

Yes. The recipe will still taste creamy and refreshing. Vanilla extract can be used in its place, although the dirty-soda flavor will be less coconut-forward.

Can I prepare the cake one day ahead?

Yes. Preparing it one day ahead gives the tres leches mixture more time to soak into the cake. Add the whipped topping several hours before serving.

Can I make individual portions?

Yes. Bake the cake in cupcake liners or small oven-safe dessert cups. Reduce the baking time and begin checking the cakes after approximately 15 minutes.

Final Thoughts

This homemade Dirty Soda Tres Leches Cake brings together moist chocolate cake, creamy tres leches soak, coconut whipped topping, and bright lime flavor. Its chilled texture and balanced sweetness make it a fun dessert for anyone who enjoys chocolate, cola-inspired flavors, and tropical finishes.