Introduction

This Copycat Olive Garden Black Tie Mousse Cake is a decadent layered dessert combining rich chocolate cake, silky chocolate and vanilla mousses, and a glossy ganache finish. It’s perfect for impressing guests or indulging in a special treat at home.

A round dessert with three visible layers: the bottom layer is dark brown cake, the middle layer is a light cream, and the top layer is a smooth chocolate mousse. The top surface has a swirled pattern of dark chocolate and white cream, creating a mix of brown and white waves. Around the edge, there are large swirls of dark brown chocolate frosting, with tiny chocolate chips scattered between the swirls and on the white marbled surface under the dessert. One slice is cut and slightly pulled away, showing the cross-section of all three layers clearly. Photo taken with an iphone --ar 4:5 --v 7

Ingredients

Cooking spray
1 1/4 cups (150 g) all-purpose flour

3/4 cup (150 g) granulated sugar
1/4 cup unsweetened cocoa powder

1 teaspoon baking soda
1/2 teaspoon kosher salt

3/4 cup brewed coffee
1/3 cup extra-virgin olive oil
1 tablespoon apple cider vinegar

1 teaspoon pure vanilla extract
3 oz dark chocolate (70% cacao), coarsely chopped
2 oz semisweet chocolate, coarsely chopped

2 tablespoons unsalted butter
4 oz cream cheese, softened
3/4 cup heavy cream

2 tablespoons confectioners’ sugar
5 oz white chocolate chips
2 tablespoons unsalted butter

12 oz semisweet chocolate, coarsely chopped
4 oz dark chocolate (70% cacao), coarsely chopped
1 oz white chocolate

1 1/2 cups heavy cream
2 cups semisweet mini chocolate chips
A piping bag and a large star tip

Instructions

Step 1: Arrange a rack in the center of the oven and preheat to 350°F. Line a 9-inch springform pan with parchment paper and grease with cooking spray.
Step 2: In a large bowl, whisk together flour, granulated sugar, cocoa powder, baking soda, and salt. Add brewed coffee, olive oil, apple cider vinegar, and vanilla extract; whisk until combined but some lumps remain. Pour the batter into the prepared pan.
Step 3: Bake until a tester inserted in the center comes out clean, about 18 minutes. Cool in the pan on a wire rack for 15 minutes, then remove the cake from the pan and wipe out the pan for later use.

Step 4: For the chocolate cheesecake mousse, microwave dark chocolate, semisweet chocolate, and butter in 15-second intervals, stirring between, until melted and smooth. In a separate bowl, beat cream cheese until smooth, then add the chocolate mixture and mix until no streaks remain.
Step 5: Whip heavy cream with confectioners’ sugar to stiff peaks. Gently fold the whipped cream into the cream cheese mixture. Cover with plastic wrap and refrigerate until ready to use.
Step 6: For the vanilla mousse, microwave white chocolate and butter in 15-second intervals until smooth. Beat cream cheese until smooth, then add the white chocolate mixture and mix until combined.

Step 7: Whip heavy cream with vanilla extract until stiff peaks form. Fold into the cream cheese mixture, cover with plastic wrap, and refrigerate.
Step 8: Line the edges of the springform pan with parchment. Place the chocolate cake layer in the center. Spread the chocolate mousse evenly over the cake, then layer the vanilla mousse on top. Refrigerate until set.
Step 9: For the ganache, combine semisweet and dark chocolates in a heatproof bowl. In another small bowl, place white chocolate. Heat heavy cream until hot, then pour 1 tablespoon over the white chocolate and the rest over the dark chocolate mixture. Let sit for 30 seconds, then stir both until smooth.

Step 10: Pour 1 cup of the dark chocolate ganache evenly over the top of the cake. Drizzle white chocolate in concentric circles, then swirl with a toothpick. Refrigerate until set, about 20 minutes.
Step 11: Carefully remove the sides of the springform pan and peel off the parchment. Transfer the cake to a serving plate, keeping it on the springform base. Spread about ½ cup of the remaining ganache around the sides of the cake.
Step 12: Press mini chocolate chips into the ganache-covered sides of the cake until fully coated.

Step 13: Fill a piping bag fitted with a star tip with the remaining ganache and pipe swirls around the edges of the cake. Refrigerate for another 20 minutes to set before serving.

Tips & Variations

Use freshly brewed coffee for a richer cake flavor; brewed espresso can be substituted for more intensity.
Make sure the cream cheese is softened for a smooth mousse without lumps.

You can substitute heavy cream with whipping cream, but the mousse may be slightly less stable.
For a different look, swirl the ganache decorations in colors by adding a bit of food coloring to the white chocolate layer.

Storage

Store the mousse cake covered in the refrigerator for up to 3 days. To keep it fresh, cover with plastic wrap or place it in an airtight container. Before serving, let the cake sit at room temperature for 15-20 minutes to soften slightly. Reheat ganache decorations gently if needed by warming slightly and stirring.

How to Serve

A round cake sits on a white marble board, cut into several slices revealing three clear layers from bottom to top: a dark brown moist base, a creamy light vanilla middle, and a thin smooth chocolate layer on top. The surface features a beautiful swirl pattern of dark chocolate and white cream, covering the whole top of the cake. Around the edge of the cake are evenly spaced dollops of thick, dark chocolate frosting textured with small ridges, forming a ring. Scattered chocolate chips add detail around the cake edges on the marble board. One slice is slightly pulled out, showing the clean layers and smooth textures inside. Photo taken with an iphone --ar 4:5 --v 7

Serve this delicious recipe with your favorite sides.

FAQs

Can I prepare parts of the cake ahead of time?

Yes, you can bake the cake and prepare the mousses and ganache a day in advance. Keep them refrigerated and assemble the cake on the day you plan to serve it for the best texture and freshness.

What if I don’t have a springform pan?

A springform pan is ideal for this layered mousse cake since it allows easy removal without damage. If you don’t have one, use a regular cake pan lined with parchment and carefully invert the cake after chilling, but be cautious as the mousse layers can be delicate.