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The Roof Restaurant’s Decadent Chocolate Mint Cake

I still remember the first time I tasted this cake. I was a young line cook, fresh out of culinary school, and completely overwhelmed by the sheer scale and elegance of The Roof Restaurant. The dessert buffet was legendary, and this Chocolate Mint Cake, with its striking layers and intensely refreshing mint flavor, was the undisputed star. Each bite was a symphony of textures – the moist devil’s food cake, the cool, velvety mint mousse, and the rich, dark chocolate ganache. It wasn’t just dessert; it was an experience.

Recipe Overview

Prep Time: 2 hours
Cook Time: 30-35 minutes
Total Time: 4 hours
Servings: 12
Yields: 1 cake
Dietary Type: Not specified

Ingredients

1 (18 1/4 ounce) package devil’s food cake mix

Mint Mousse:

½ (1/4 ounce) package Knox unflavored gelatin
½ cup boiling water
2 ounces white baking chocolate
1 egg yolk
1 ½ teaspoons honey or 1 ½ teaspoons corn syrup
1 tablespoon milk
1 ½ cups heavy cream
2 tablespoons mint extract
2-3 drops green food coloring

Dark Chocolate Mousse:

7 ounces dark chocolate
3 ½ egg yolks
¼ cup honey or ¼ cup corn syrup
1 cup heavy cream

Ganache:

2 cups heavy cream
8 ounces semisweet chocolate

Equipment Needed

Three 9-inch round cake pans (or two, if cutting layers)
Double boiler or heat-safe bowl and saucepan
Mixing bowls
Whisk
Spatula
Saucepan
Refrigerator

Instructions

Prepare the Devil’s Food Cake: Follow the package directions for the devil’s food cake mix.
Bake the Cake Layers: For a 3-layer cake, divide the batter evenly among three greased and floured 9-inch round pans. Bake according to the package directions, usually around 30-35 minutes, or until a toothpick inserted into the center comes out clean. If you prefer a 4-layer cake, bake the batter in two 9-inch round pans, let them cool completely, and then carefully cut each cake in half horizontally.
Cool the Cake Layers: Let the cake layers cool in the pans for about 10 minutes before inverting them onto a wire rack to cool completely. Ensure the cakes are completely cool before assembling the cake.
Prepare the Mint Mousse: Sprinkle the gelatin over the boiling water in a small bowl. Let it sit for a few minutes to soften. Refrigerate until set.
Melt the Gelatin: Once the gelatin is set, place the bowl in cold water to soften it enough to loosen it from the pan. Transfer the softened gelatin to a double boiler and melt completely.
Melt the White Chocolate: In a separate double boiler, melt the white baking chocolate carefully, ensuring it doesn’t burn.
Combine Chocolate and Gelatin: Add the melted white chocolate to the melted gelatin and mix thoroughly.
Prepare the Egg Yolk Mixture: In a small bowl, whip the egg yolk by hand until it forms soft, foamy peaks.
Heat the Honey: In a small saucepan, bring the honey (or corn syrup) to a boil.
Temper the Egg Yolks: Slowly pour the hot honey onto the whipped egg yolks, stirring constantly to prevent the yolks from cooking.
Combine with Chocolate: Fold the melted white chocolate and gelatin mixture into the yolk mixture.
Heat the Milk: Heat the milk in a small saucepan until warm.
Incorporate the Milk: Stir the warm milk into the chocolate mixture.
Whip the Cream: In a large bowl, whip the heavy cream to soft peaks.
Fold in Cream: Gently fold the whipped cream into the chocolate mixture.
Add Flavor and Color: Add the mint extract and green food coloring to the mousse. Stir gently until evenly distributed.
Assemble the Cake: Place one cake layer on a serving plate or cake stand. Spread a generous layer of mint mousse over the cake. Repeat with the remaining cake layers and mint mousse, ending with a layer of cake on top.
Prepare the Dark Chocolate Mousse: Chop the dark chocolate into chunks and carefully melt it in a double boiler or in the microwave in short intervals, stirring frequently to prevent burning.
Whip the Egg Yolks: In a separate bowl, whip the egg yolks to soft peaks.
Heat the Honey: In a small saucepan, bring the honey (or corn syrup) to a boil.
Temper the Egg Yolks: While the honey is still hot, slowly pour it into the whipped egg yolks, stirring constantly, and whip until thick.
Fold in Chocolate: Gently fold the warm, melted dark chocolate into the yolk mixture.
Whip the Cream: In a medium bowl, whip the heavy cream to soft peaks.
Fold in Cream: Fold the whipped cream into the chocolate mixture.
Cover the Cake: Spread the dark chocolate mousse evenly over the top and around the sides of the cake.
Refrigerate: Place the cake in the refrigerator to set for at least 2 hours, or preferably overnight.
Prepare the Ganache: Scald the heavy cream in a small saucepan over medium heat. Do not boil.
Chop the Chocolate: Chop the semisweet chocolate into pieces.
Melt the Ganache: Remove the cream from the heat and add the chopped chocolate. Stir until the chocolate is completely melted and the ganache is smooth.
Pour Ganache: Pour the ganache evenly over the top of the dark chocolate mousse.
Garnish: Garnish with chocolate mint truffles or fresh berries, if desired.

Expert Tips & Tricks

Room Temperature Cake: Using cake layers that are completely cooled is crucial for preventing the mousse from melting. You can even chill the layers briefly in the freezer for faster cooling.
Even Cake Layers: For perfectly even cake layers, use cake strips wrapped around the outside of the cake pans during baking. These help to insulate the sides of the pan and prevent the edges from baking faster than the center.
Gelatin Mastery: The key to a perfect mint mousse lies in properly handling the gelatin. Ensure it’s fully dissolved and evenly distributed to avoid a grainy texture.
Chocolate Tempering (Optional): For an extra glossy ganache, temper the chocolate before adding it to the cream. This involves melting and cooling the chocolate within a specific temperature range.
Mint Extract Quality: The quality of your mint extract significantly impacts the flavor of the mousse. Opt for a high-quality extract for the best results.

Serving & Storage Suggestions

Serve the Chocolate Mint Cake chilled. A slice of this decadent cake pairs perfectly with a scoop of vanilla ice cream or a dollop of whipped cream.

Store leftover cake in the refrigerator, covered, for up to 3 days. The cake can also be frozen for longer storage, up to 2 months. Thaw it in the refrigerator overnight before serving.

Nutritional Information

Nutrient	Amount per Serving	% Daily Value
Calories	884 kcal	N/A
Calories from Fat	670 kcal	N/A
Total Fat	74.5 g	114%
Saturated Fat	43 g	214%
Cholesterol	241.5 mg	80%
Sodium	424.7 mg	17%
Total Carbohydrate	59 g	19%
Dietary Fiber	7 g	28%
Sugars	30.1 g	N/A
Protein	11.6 g	23%

Note: Nutritional information is an estimate and may vary based on specific ingredients and preparation methods.

Variations & Substitutions

Gluten-Free: Use a gluten-free devil’s food cake mix for a gluten-free version.
Dairy-Free: Substitute non-dairy heavy cream (such as coconut cream or soy cream) for the heavy cream in the mousses and ganache. Use dairy-free chocolate.
Peppermint Twist: Substitute peppermint extract for the mint extract for a slightly different flavor profile.
Seasonal Berries: Garnish with seasonal berries for a festive touch.
Chocolate Cake Substitute: You can substitute any kind of chocolate cake or flavor that you like instead of devil’s food cake.
Healthier Mousse: Substitute yogurt (Greek or otherwise) to make the mousse healthier. It will make it less decadent.
Lower-Sugar Ganache: Replace the cream with a dairy-free or sugar-free substitute to lower the sugar content.

FAQs (Frequently Asked Questions)

Q: Can I make the cake layers ahead of time?
A: Absolutely! The cake layers can be baked a day or two in advance, wrapped tightly in plastic wrap, and stored at room temperature or in the refrigerator.

Q: Can I freeze the entire cake?
A: Yes, you can freeze the assembled cake. Wrap it tightly in plastic wrap and then foil. Thaw it in the refrigerator overnight before serving.

Q: How do I prevent the ganache from being too thin or too thick?
A: The key is to use the correct ratio of cream to chocolate. Also, ensure that the cream is scalded but not boiled, and that the chocolate is finely chopped for even melting.

Q: What can I use if I don’t have a double boiler?
A: You can create a makeshift double boiler by placing a heat-safe bowl over a saucepan filled with simmering water. Ensure the bottom of the bowl doesn’t touch the water.

Q: How can I make the green color more vibrant?
A: Add the green food coloring gradually, a drop at a time, until you achieve the desired shade. Gel food coloring is more concentrated and provides a richer color than liquid food coloring.

Final Thoughts

This Chocolate Mint Cake is more than just a recipe; it’s a journey back to a time of culinary discovery. It’s a celebration of flavor and texture, and a testament to the power of a truly unforgettable dessert. I encourage you to try your hand at recreating this masterpiece. Don’t be intimidated by the multiple steps; each one is simple and rewarding. Share your creations and experiences, and let’s continue to elevate the art of baking together. This cake pairs beautifully with a cup of hot coffee or a glass of cold milk, making it perfect for any occasion.

The Roof Restaurant Chocolate Mint Cake Recipe