Go Back
–+ servings
Tuxedo Cake Costco Copy Cat

Tuxedo Cake Costco

The Crispy Chef
This Tuxedo Cake Costco Copy Cat recipe perfectly replicates the famous Costco dessert at home! Rich chocolate cake layers, creamy white chocolate mousse, and glossy ganache make it a showstopper for any occasion. You won't need to drive to the warehouse anymore!
Print Recipe Pin Recipe
Prep Time 45 minutes
Cook Time 35 minutes
Total Time 2 hours 20 minutes
Course Dessert
Cuisine American
Servings 12
Calories 520 kcal

Equipment

  • 2 x 9-inch round cake pans
  • Mixing bowls
  • Hand or stand mixer
  • Whisk
  • Rubber spatula
  • Saucepan
  • Wire rack
  • Serrated knife (for leveling)
  • Cake plate

Ingredients
  

For the Chocolate Cake Layers:

  • 2 cups all-purpose flour
  • 2 cups granulated sugar
  • ¾ cup unsweetened cocoa powder
  • 2 tsp baking soda
  • 1 tsp baking powder
  • 1 tsp salt
  • 2 large eggs room temperature
  • 1 cup buttermilk or 1 cup milk + 1 tbsp vinegar
  • ½ cup vegetable oil
  • 2 tsp vanilla extract
  • 1 cup hot coffee or hot water

For the White Chocolate Mousse:

  • 12 oz white chocolate chips
  • 2½ cups heavy whipping cream divided
  • ¼ cup powdered sugar
  • 1 tsp vanilla extract

For the Chocolate Ganache:

  • 1 cup semi-sweet chocolate chips
  • ½ cup heavy cream
  • 2 tbsp unsalted butter

Instructions
 

Preheat Oven & Prepare Pans:

  • Preheat oven to 350°F (175°C). Grease two 9-inch round pans and line bottoms with parchment paper.

Make Chocolate Cake Layers:

  • In a large bowl, whisk flour, sugar, cocoa, baking soda, baking powder, and salt.
  • Add eggs, buttermilk, oil, and vanilla. Mix until just combined.
  • Carefully stir in hot coffee. Batter will be thin.
  • Divide evenly between pans and bake for 30–35 minutes. Cool 10 minutes in pans, then transfer to racks to cool completely.

Prepare White Chocolate Mousse:

  • Heat 1 cup cream to simmer. Pour over white chocolate chips in bowl. Let sit 1 minute, then stir until smooth. Cool to room temperature (~30 min).
  • In separate bowl, beat remaining 1½ cups cream with powdered sugar and vanilla to soft peaks.
  • Gently fold cooled white chocolate mixture into whipped cream. Chill 30 minutes.

Make Ganache:

  • Heat cream to just simmering and pour over chocolate chips. Let sit 2 minutes, then stir until smooth.
  • Stir in butter until melted and glossy. Let cool slightly before using.

Assemble Cake:

  • Level cake layers if needed. Place one layer on cake plate, spread half of mousse on top.
  • Add second cake layer, spread remaining mousse on top.
  • Chill for 1 hour. Pour ganache over top, letting it drip down sides.
  • Refrigerate at least 2 hours before serving (overnight is best).

Notes

Can be made 1–2 days ahead for best flavor.
Store covered in refrigerator up to 5 days.
Not freezer-friendly due to mousse texture.
For cleaner slices, dip knife in hot water between cuts.
Variations: Add raspberry jam, mini chocolate chips, mint extract, or espresso powder for twists.

Nutrition

Calories: 520kcalCarbohydrates: 55gProtein: 5gFat: 32g
Keyword Costco tuxedo cake
Tried this recipe?Mention @Thecrispycheff or tag #Thecrispychef!