Tuxedo Cake

I remember the first time I layered dark mousse and white mousse between two ultra-moist chocolate cakes and poured glossy ganache over the top. The contrast in textures and the dramatic black-and-white look make Tuxedo Cake a showstopper for birthdays, dinner parties, or any celebration when you want chocolate that looks as good as it tastes. If you like desserts that combine a deeply chocolate sponge with light, airy mousse and a silky finish, this cake delivers every time. For another easy treat to serve alongside a slice, try this flourless oatmeal carrot cake for a complementary simple option.

Why you’ll love this dish

This Tuxedo Cake hits several sweet spots. The cake itself is a simple, reliable chocolate sponge made extra tender by oil and boiling water. The two mousses—dark and white—add elegant layers of flavor without weighing the cake down. A smooth ganache finish brings shine and richness while keeping the exterior clean and modern. Make it for celebrations, potlucks, or when you want an impressive dessert that is mostly make-ahead friendly. It is also kid-approved and easy to scale up for larger gatherings.

Step-by-step overview

You will: bake two thin, moist chocolate layers, cool them, spread dark mousse on one and white mousse on the other, chill to set the mousse, then pour warm ganache over the chilled cake and refrigerate until firm. Expect about 30–35 minutes baking time, plus chilling. Most of the work is assembly, so the process is straightforward and forgiving.

Gather these items

• 2 cups all-purpose flour
• 2 cups granulated sugar
• 3/4 cup unsweetened cocoa powder (use Dutch-processed for a deeper flavor)
• 1 1/2 teaspoons baking powder
• 1 1/2 teaspoons baking soda
• 1 teaspoon salt
• 2 large eggs, room temperature (bring to room temp for even mixing)
• 1 cup whole milk (substitute: a non-dairy milk with added fat for similar texture)
• 1/2 cup vegetable oil (substitute: light olive oil or melted coconut oil)
• 2 teaspoons vanilla extract
• 1 cup boiling water (this blooms the cocoa and thins the batter)
• 1 1/2 cups dark chocolate mousse (homemade or store-bought)
• 1 1/2 cups white chocolate mousse (homemade or store-bought)
• 1 cup chocolate ganache (warm until pourable)

Notes: If using store-bought mousses, check sugar levels and consistency; you may want to whip them slightly before spreading for easier smoothing.

Step-by-step instructions

1. Preheat the oven to 350°F (175°C). Grease two 9-inch round cake pans. Lightly flour them and line the bottoms with parchment.
2. In a large bowl, whisk flour, sugar, cocoa, baking powder, baking soda, and salt until combined.
3. Add eggs, milk, oil, and vanilla. Beat on medium speed for 2 minutes until smooth and slightly aerated.
4. Pour in the boiling water. Stir carefully until the batter is fully combined. The batter will be thin.
5. Divide the batter evenly between the prepared pans. Smooth the tops.
6. Bake 30 to 35 minutes, until a toothpick inserted into the centers comes out clean.
7. Let the cakes rest 10 minutes in the pans. Invert onto wire racks and cool completely.
8. Place one cake layer on the serving plate. Spread 3/4 cup dark chocolate mousse evenly over the top.
9. Add the second cake layer. Spread 3/4 cup white chocolate mousse on top. Chill at least 30 minutes to firm the mousse.
10. Warm the chocolate ganache until pourable. Pour and smooth it over the top and sides of the chilled cake.
11. Refrigerate at least 2 hours, until the ganache and mousse are set. Remove from the fridge 15 minutes before slicing for a cleaner cut.

Best ways to enjoy it

Serve slices slightly chilled so the mousse keeps shape but the cake is soft. Pair with freshly brewed coffee or a milky hot beverage. For a plated dessert, add a spoonful of raspberries or a dusting of cocoa alongside the slice for color contrast. If you want a quick bite on the side, consider a contrasting small sweet like no-bake cake batter protein balls to balance the rich chocolate.

Storage and reheating tips

Store the finished cake covered in the refrigerator. Because it contains mousse and ganache, keep it chilled and use within 3 to 4 days for best texture and food safety. To freeze, wrap slices individually in plastic wrap and place in an airtight container for up to 2 months. Thaw overnight in the refrigerator. Do not leave mousse-filled cake at room temperature for more than two hours to avoid food safety risks.

Pro chef tips

• Bring eggs and milk to room temperature for even emulsification and better rise.
• Bloom the cocoa with the boiling water to deepen flavor and ensure a moist crumb.
• Use parchment on the pan bottoms to remove cake layers cleanly.
• If your mousse is very soft, chill it briefly before spreading to prevent sliding.
• Warm ganache in short microwave bursts or over a double boiler. Stir until just pourable—too hot ganache can melt the mousse.
• Let the cake rest at least 15 minutes after refrigeration before slicing to get neat slices.

Creative twists

• Swap the white chocolate mousse for a coffee mousse to add a mocha profile.
• Add a thin layer of raspberry jam under the white mousse for a fruit contrast.
• Make mini Tuxedo cakes in 6-inch pans for individual servings.
• For a lighter version, use a mousse made with whipped Greek yogurt and tempered white chocolate, but keep refrigeration strict.
• Decorate the ganache with chocolate shavings or piped whipped cream for a classic finish.

Helpful answers

How long does this cake take from start to finish?

Active prep and bake take about 1 hour. Chilling for mousse and ganache firming adds at least 2.5 hours. Plan for about 3.5 to 4 hours total if you include cooling times.

Can I use store-bought mousse and ganache?

Yes. Store-bought mousses speed assembly and are fine quality. Warm store-bought ganache gently until pourable. Just check ingredients if you need lower sugar or dairy-free options.

Can I make elements ahead of time?

You can bake the cake layers a day or two ahead and keep them tightly wrapped in the refrigerator. Mousses and ganache keep well refrigerated for a few days. Assemble the cake the day you plan to serve for the best texture and appearance.

How do I get clean slices?

Chill the cake well, remove from the fridge 15 minutes before slicing, and use a hot, clean knife. Wipe the knife between cuts for perfect slices.

Is this recipe freezer friendly?

Yes. Freeze individual slices wrapped tightly for up to 2 months. Thaw in the refrigerator overnight to maintain mousse structure.

Enjoy making the Tuxedo Cake. With a little planning for chilling and assembly, it rewards you with dramatic looks and layers of chocolate flavor.

Tuxedo Cake

This stunning Tuxedo Cake features layers of decadent dark and white mousse between moist chocolate sponge, finished with a glossy ganache. Perfect for celebrations and potlucks.

Print Recipe Pin Recipe

Prep Time 1 hour hr

Cook Time 35 minutes mins

Total Time 4 hours hrs

Servings: 12 servings

Course: Cake, Dessert

Cuisine: American

Calories: 450

Ingredients Method Nutrition Notes

Ingredients

  

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For the chocolate cake

• 2 cups all-purpose flour
• 2 cups granulated sugar
• 3/4 cup unsweetened cocoa powder (preferably Dutch-processed) for a deeper flavor
• 1 1/2 teaspoons baking powder
• 1 1/2 teaspoons baking soda
• 1 teaspoon salt
• 2 large eggs, room temperature bring to room temp for even mixing
• 1 cup whole milk substitute with non-dairy milk with added fat
• 1/2 cup vegetable oil substitute with light olive oil or melted coconut oil
• 2 teaspoons vanilla extract
• 1 cup boiling water this blooms the cocoa and thins the batter

For the mousse and ganache

• 1 1/2 cups dark chocolate mousse (homemade or store-bought) check sugar levels and consistency; consider whipping slightly before spreading
• 1 1/2 cups white chocolate mousse (homemade or store-bought) check sugar levels and consistency; consider whipping slightly before spreading
• 1 cup chocolate ganache warm until pourable

Method

 

Preparation

1. Preheat the oven to 350°F (175°C). Grease two 9-inch round cake pans. Lightly flour them and line the bottoms with parchment.
2. In a large bowl, whisk together flour, sugar, cocoa, baking powder, baking soda, and salt until combined.
3. Add eggs, milk, oil, and vanilla. Beat on medium speed for 2 minutes until smooth and slightly aerated.
4. Pour in the boiling water. Stir carefully until the batter is fully combined. The batter will be thin.
5. Divide the batter evenly between the prepared pans. Smooth the tops.
6. Bake for 30 to 35 minutes, until a toothpick inserted into the centers comes out clean.
7. Let the cakes rest for 10 minutes in the pans. Invert onto wire racks and cool completely.

Assembly

1. Place one cake layer on the serving plate. Spread 3/4 cup of dark chocolate mousse evenly over the top.
2. Add the second cake layer. Spread 3/4 cup of white chocolate mousse on top. Chill for at least 30 minutes to firm the mousse.
3. Warm the chocolate ganache until pourable. Pour and smooth it over the top and sides of the chilled cake.
4. Refrigerate for at least 2 hours, until the ganache and mousse are set. Remove from the fridge 15 minutes before slicing for a cleaner cut.

Nutrition

Serving: 1Calories: 450kcalCarbohydrates: 60gProtein: 6gFat: 22gSaturated Fat: 12gSodium: 300mgFiber: 3gSugar: 30g

Notes

Serve slices slightly chilled to maintain mousse shape while keeping the cake soft. Pair with freshly brewed coffee or a milky hot beverage. For a plated dessert, add a spoonful of raspberries or a dusting of cocoa alongside the slice for color. Store covered in the refrigerator for 3 to 4 days.

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