Indulge in this Mocha Layer Cake with Chocolate-Rum Cream Filling. Moist coffee-infused chocolate cake layers are filled with a rich chocolate-rum cream and finished with silky mocha buttercream, making it the perfect dessert for celebrations and special occasions.

Mocha Layer Cake with Chocolate-Rum Cream Filling

If you’re a fan of chocolate and coffee, this Mocha Layer Cake with Chocolate-Rum Cream Filling is the ultimate dessert. Rich chocolate cake infused with bold coffee flavors is layered with a luscious chocolate-rum cream that adds a smooth, decadent touch to every bite. Finished with a creamy mocha buttercream and topped with chocolate curls or cocoa powder, this elegant cake is ideal for birthdays, holidays, dinner parties, or any occasion worth celebrating.

The combination of deep cocoa, aromatic espresso, and subtle rum creates a sophisticated flavor that’s both indulgent and unforgettable.

Why You’ll Love This Recipe

Rich chocolate and coffee flavor
Moist, tender cake layers
Creamy chocolate-rum filling
Smooth mocha buttercream frosting
Perfect for celebrations and holidays
Can be made a day in advance

Ingredients

For the Chocolate Mocha Cake

2 cups (250g) all-purpose flour
¾ cup (65g) unsweetened cocoa powder
2 teaspoons baking powder
1½ teaspoons baking soda
½ teaspoon salt
2 cups (400g) granulated sugar
2 large eggs, room temperature
1 cup (240ml) whole milk
½ cup (120ml) vegetable oil
2 teaspoons vanilla extract
1 cup (240ml) hot brewed coffee
1 teaspoon espresso powder (optional, for a stronger coffee flavor)

For the Chocolate-Rum Cream Filling

1 cup (240ml) heavy whipping cream
6 ounces (170g) semi-sweet chocolate, finely chopped
2 tablespoons dark rum
1 tablespoon powdered sugar
1 teaspoon vanilla extract

For the Mocha Buttercream

1 cup (226g) unsalted butter, softened
4 cups (480g) powdered sugar
¼ cup unsweetened cocoa powder
2 teaspoons espresso powder dissolved in 2 tablespoons warm milk
1 teaspoon vanilla extract
2–3 tablespoons heavy cream
Pinch of salt

Optional Garnishes

Chocolate curls
Chocolate-covered espresso beans
Cocoa powder
Shaved dark chocolate
Fresh berries

Kitchen Equipment

Two 9-inch round cake pans
Mixing bowls
Electric mixer
Whisk
Rubber spatula
Cooling racks
Offset spatula
Cake turntable (optional)

Step-by-Step Directions

Step 1: Prepare the Oven

Preheat your oven to 350°F (175°C).

Grease and line two 9-inch cake pans with parchment paper.

Step 2: Mix the Dry Ingredients

In a large bowl, whisk together:

Flour
Cocoa powder
Baking powder
Baking soda
Salt

Set aside.

Step 3: Mix the Wet Ingredients

In another large bowl, whisk together:

Sugar
Eggs
Milk
Vegetable oil
Vanilla extract

Mix until smooth.

Step 4: Combine the Batter

Gradually add the dry ingredients to the wet ingredients.

Mix until just combined.

Stir the espresso powder into the hot coffee, then slowly pour the coffee into the batter.

Mix until smooth. The batter will be thin, which helps create a moist cake.

Step 5: Bake the Cake

Divide the batter evenly between the prepared pans.

Bake for 30–35 minutes, or until a toothpick inserted into the center comes out clean.

Allow the cakes to cool in the pans for 10 minutes before transferring them to wire racks to cool completely.

Make the Chocolate-Rum Cream Filling

Step 6: Heat the Cream

Heat the heavy cream in a small saucepan until it just begins to simmer.

Do not let it boil.

Step 7: Melt the Chocolate

Pour the hot cream over the chopped chocolate.

Let it sit for 2 minutes.

Stir until smooth and glossy.

Step 8: Add Flavoring

Stir in:

Dark rum
Powdered sugar
Vanilla extract

Allow the mixture to cool until thick enough to spread. For a fluffier texture, chill it for 20–30 minutes and whip lightly with a mixer.

Make the Mocha Buttercream

Step 9: Beat the Butter

Beat the softened butter for 3–4 minutes until light and creamy.

Step 10: Add Remaining Ingredients

Gradually beat in:

Powdered sugar
Cocoa powder
Espresso mixture
Vanilla extract
Salt

Add heavy cream one tablespoon at a time until the frosting reaches a smooth, spreadable consistency.

Beat for another 2–3 minutes until fluffy.

Assemble the Cake

Step 11: Layer the Cake

Place one cake layer on a serving plate.

Spread the chocolate-rum cream filling evenly over the top.

Leave a small border around the edge to prevent the filling from spilling out.

Place the second cake layer on top.

Step 12: Frost the Cake

Apply a thin crumb coat of mocha buttercream.

Refrigerate for 20 minutes.

Spread the remaining buttercream evenly over the top and sides of the cake.

Smooth the frosting using an offset spatula.

Step 13: Decorate

Finish with your choice of:

Chocolate curls
Chocolate-covered espresso beans
Shaved chocolate
Light dusting of cocoa powder
Fresh berries

Serving Suggestions

This cake pairs beautifully with:

Freshly brewed coffee
Espresso
Cappuccino
Vanilla ice cream
Whipped cream
Fresh raspberries or strawberries

Storage Tips

Refrigerator

Store covered in the refrigerator for up to 5 days.

Bring to room temperature for about 30 minutes before serving for the best flavor and texture.

Freezer

Wrap individual slices tightly in plastic wrap and foil.

Freeze for up to 3 months.

Thaw overnight in the refrigerator.

Helpful Tips

Use room-temperature ingredients for a smoother batter.
Freshly brewed hot coffee enhances the chocolate flavor.
Don’t overmix the batter to keep the cake tender.
Chill the filling slightly before assembling to make spreading easier.
Use freshly grated chocolate for the most attractive garnish.

Recipe Variations

Alcohol-Free Version

Replace the dark rum with 2 tablespoons of strong brewed coffee or 1 teaspoon of rum extract mixed with 1 tablespoon of water.

Extra Chocolate

Add mini chocolate chips between the cake layers.

Hazelnut Mocha Cake

Spread a thin layer of chocolate-hazelnut spread beneath the chocolate cream filling.

Salted Mocha Cake

Sprinkle flaky sea salt over the finished frosting for a sweet-and-salty contrast.

Three-Layer Cake

Divide the batter among three 8-inch cake pans and reduce the baking time to about 25–30 minutes.

Frequently Asked Questions

Can I make this cake ahead of time?

Yes. Bake the cake layers one day ahead, wrap them well, and store them at room temperature. Assemble and frost the cake the next day.

Can I use instant coffee instead of espresso powder?

Yes. Dissolve 1–2 teaspoons of instant coffee granules in the hot coffee or warm milk.

What type of rum works best?

Dark rum provides the richest flavor, but spiced rum also works well. For a milder taste, reduce the amount to 1 tablespoon.

Can I use milk chocolate instead of semi-sweet chocolate?

Yes, but the filling will be sweeter and slightly softer.

How do I keep the cake moist?

Avoid overbaking, measure the flour accurately, and store the cake in an airtight container to preserve its moisture.

Final Thoughts

This Mocha Layer Cake with Chocolate-Rum Cream Filling is an elegant dessert that combines bold coffee, rich chocolate, and smooth rum flavors in every slice. Moist cake layers, a silky chocolate filling, and creamy mocha buttercream create a bakery-worthy centerpiece that’s perfect for birthdays, holidays, anniversaries, or any special occasion. Whether served with coffee after dinner or as the highlight of a celebration, this cake is sure to impress both chocolate lovers and coffee enthusiasts alike.