Costco Tuxedo Cake Copycat Recipe
This homemade version of Costco's famous Tuxedo Cake features layers of moist chocolate sponge, rich chocolate mousse, creamy white chocolate mousse, and a silky ganache topping. Perfect for chocolate lovers, this elegant dessert is great for special occasions or indulgent treats at home.
Equipment
- 2 9-inch Cake Pans Greased and lined
- 1 Mixing Bowl For batter prep
- 1 Electric Mixer For whipping mousse
- 1 Saucepan For ganache
Ingredients
- For the Chocolate Cake:
- 1 ¾ cups all-purpose flour
- ¾ cup unsweetened cocoa powder
- 2 cups granulated sugar
- 1 ½ tsp baking powder
- ½ tsp baking soda
- ½ tsp salt
- 2 eggs
- 1 cup buttermilk
- ½ cup vegetable oil
- 1 tsp vanilla extract
- 1 cup hot water
- For the Chocolate Mousse:
- 1 cup heavy cream
- 1 cup dark chocolate chips
- 2 tbsp sugar
- 1 tsp vanilla extract
- For the White Chocolate Mousse:
- 1 cup heavy cream
- 1 cup white chocolate chips
- 2 tbsp sugar
- 1 tsp vanilla extract
- For the Ganache Topping:
- ½ cup heavy cream
- 1 cup dark chocolate chips
Instructions
- Step 1: Make the Chocolate Cake
- Preheat oven to 350°F (175°C). Grease and line two 9-inch cake pans.
- In a large mixing bowl, sift together flour, cocoa powder, sugar, baking powder, baking soda, and salt.
- In another bowl, whisk eggs, buttermilk, oil, and vanilla extract until smooth. Gradually mix into dry ingredients.
- Slowly add hot water, stirring until the batter is smooth.
- Divide batter evenly between the prepared pans.
- Bake for 30–35 minutes, or until a toothpick inserted in the center comes out clean.
- Let the cakes cool completely before assembling.
- Step 2: Prepare the Chocolate Mousse
- Heat 1 cup heavy cream in a saucepan until warm but not boiling.
- Pour over dark chocolate chips and let sit for a minute. Stir until smooth.
- Add sugar and vanilla extract, then refrigerate for 30 minutes before whipping to fluffy peaks.
- Step 3: Prepare the White Chocolate Mousse
- Repeat the same steps as the chocolate mousse, using white chocolate chips instead.
- Step 4: Assemble the Cake
- Place one cake layer on a serving plate.
- Spread a thick layer of chocolate mousse evenly on top.
- Add the second cake layer and spread the white chocolate mousse over it.
- Step 5: Make the Ganache
- Heat ½ cup heavy cream until warm.
- Pour over dark chocolate chips, stirring until smooth.
- Let cool slightly, then pour over the cake, allowing it to drip down the sides.
- Step 6: Decorate and Chill
- Garnish with chocolate shavings or decorative toppings.
- Refrigerate for at least 2 hours before serving to allow layers to set.
Notes
Use high-quality chocolate for the best flavor.
Chill mousse layers before assembling to prevent melting.
Drizzle white chocolate over the ganache for a tuxedo-like effect.