Whipped Chocolate Ganache Cake

Featured in: Midday Momentum

This decadent cake features a moist, cocoa-rich base made with coffee and vanilla for depth. The cake is topped with a fluffy, whipped chocolate ganache that adds a smooth, creamy texture. Artistic marzipan or modeling chocolate rats garnish the surface, creating a playful and elegant presentation. Baking time totals 40 minutes, making it a satisfying project with impressive results for modern European dessert lovers.

Updated on Wed, 12 Nov 2025 13:21:00 GMT
Moist Rat Cake with whipped chocolate ganache, a dark and delicious dessert, ready to serve. Save to Pinterest
Moist Rat Cake with whipped chocolate ganache, a dark and delicious dessert, ready to serve. | krispyrecipes.com

A whimsically dark and decadent chocolate cake inspired by avant-garde patisserie, Rat Cake with Whipped Chocolate Ganache is perfect for dessert lovers seeking something fun and delicious. Featuring a rich, moist chocolate base and airy whipped ganache, this treat is adorned with playful rat shapes for added charm.

I first made this cake for a Halloween gathering, and it quickly became an instant favorite thanks to its playful appearance and deeply indulgent taste. Guests were delighted by the surprise rat figures and the luscious whipped ganache, making it a memorable centerpiece.

Ingredients

  • Cake Base: 1 1/2 cups (190 g) all-purpose flour, 1 1/2 tsp baking powder, 1/2 tsp baking soda, 1/2 tsp fine sea salt, 3/4 cup (65 g) unsweetened cocoa powder, 1 1/4 cups (250 g) granulated sugar, 2 large eggs (room temperature), 3/4 cup (180 ml) whole milk, 1/2 cup (120 ml) vegetable oil, 2 tsp pure vanilla extract, 3/4 cup (180 ml) hot brewed coffee
  • Whipped Chocolate Ganache: 8 oz (225 g) semi-sweet chocolate (chopped), 1 cup (240 ml) heavy cream, pinch of salt
  • Rat Decorations: 5 oz (140 g) marzipan or modeling chocolate, black, pink, and gray food coloring gel (optional), edible silver dust or shimmer (optional)

Instructions

Prep Cake Pan:
Preheat the oven to 350°F (175°C). Grease and line a 9-inch (23 cm) round cake pan with parchment paper.
Mix Dry Ingredients:
Sift flour, baking powder, baking soda, salt, and cocoa powder in a large bowl.
Add Sugar:
Mix in granulated sugar until evenly combined.
Combine Wet Ingredients:
Whisk eggs, milk, oil, and vanilla in a separate bowl until blended. Pour into dry ingredients and mix until smooth.
Incorporate Coffee:
Gradually add hot coffee, mixing until batter is glossy and well-blended.
Bake Cake:
Pour batter into the prepared pan and bake for 35 to 40 minutes, until a toothpick inserted in the center comes out clean. Cool cake completely on a wire rack.
Prepare Ganache:
Place chopped chocolate in a heatproof bowl. Heat cream with a pinch of salt until just boiling, then pour over chocolate. Let sit for 2 minutes, then stir until smooth.
Whip Ganache:
Refrigerate ganache for 45 minutes, then whip with a hand mixer until light and fluffy.
Frost Cake:
Spread whipped ganache generously over cooled cake.
Create Rat Decorations:
Knead marzipan or modeling chocolate with food coloring, shape into small rats, tails, and ears. Use a toothpick for details and add edible silver dust if desired.
Decorate Cake:
Arrange rat decorations on top in a whimsical, chaotic pattern.
Detailed shot: the Rat Cake features dark chocolate cake, fluffy ganache, and playful marzipan rats. Save to Pinterest
Detailed shot: the Rat Cake features dark chocolate cake, fluffy ganache, and playful marzipan rats. | krispyrecipes.com

Making rat shapes sparked laughter among my kids, turning cake decorating into an imaginative family activity. Their creative rat arrangements always make serving this dessert a fun, shared experience.

Required Tools

Essential equipment includes a 9-inch cake pan, mixing bowls, an electric mixer or whisk, a sifter, rubber spatula, parchment paper, and sculpting tools or toothpicks for rat details.

Allergen Information

The cake contains eggs, milk/dairy, wheat/gluten, and almonds if marzipan is used. For nut-free, use modeling chocolate and check labels for soy traces in chocolate.

Nutritional Information

Each serving provides approximately 410 calories, 22 g total fat, 52 g carbohydrates, and 5 g protein.

Decadent, sliceable Rat Cake: enjoy a slice of this rich chocolate dessert with its whimsical design. Save to Pinterest
Decadent, sliceable Rat Cake: enjoy a slice of this rich chocolate dessert with its whimsical design. | krispyrecipes.com

This Rat Cake is sure to captivate both eyes and taste buds. Share with family and friends as a centerpiece or playful dessert everyone will remember.

Common Recipe Questions

What gives the cake its moist texture?

The addition of hot brewed coffee and vegetable oil helps create a moist, tender crumb in the cake base.

How is the whipped chocolate ganache prepared?

Warm cream and salt are poured over chopped semi-sweet chocolate, cooled, then whipped until light and airy.

Can the marzipan decorations be substituted?

Yes, modeling chocolate works well as an alternative for the sculpted rat details.

What tools are needed for the decoration?

Small sculpting tools or toothpicks help shape the marzipan or modeling chocolate figurines.

How can the flavor be enhanced?

A pinch of chili powder in the ganache adds a subtle spicy note to balance the sweetness.

Whipped Chocolate Ganache Cake

Rich chocolate base topped with light whipped chocolate ganache and detailed marzipan accents.

Prep Duration
40 minutes
Cooking Duration
40 minutes
Overall Time
80 minutes
Created by Mia Harper

Recipe Type Midday Momentum

Skill Level Medium

Cuisine Type Modern European

Total Portions 10 Serving Size

Dietary Considerations Veggie-Friendly

What You’ll Need

Cake Base

01 1 1/2 cups all-purpose flour
02 1 1/2 teaspoons baking powder
03 1/2 teaspoon baking soda
04 1/2 teaspoon fine sea salt
05 3/4 cup unsweetened cocoa powder
06 1 1/4 cups granulated sugar
07 2 large eggs, room temperature
08 3/4 cup whole milk
09 1/2 cup vegetable oil
10 2 teaspoons pure vanilla extract
11 3/4 cup hot brewed coffee

Whipped Chocolate Ganache

01 8 ounces semi-sweet chocolate, chopped
02 1 cup heavy cream
03 Pinch of salt

Rat Decorations

01 5 ounces marzipan or modeling chocolate
02 Black, pink, and gray food coloring gel (optional)
03 Edible silver dust or shimmer (optional)

How to Make It

Step 01

Prepare Pan: Preheat oven to 350°F. Grease and line a 9-inch round pan with parchment paper.

Step 02

Mix Dry Ingredients: Sift together flour, baking powder, baking soda, salt, and cocoa powder in a large bowl.

Step 03

Add Sugar: Incorporate granulated sugar into the dry mixture and blend evenly.

Step 04

Combine Wet Ingredients: Whisk eggs, milk, vegetable oil, and vanilla extract until homogenous, then add to dry ingredients and stir until smooth.

Step 05

Incorporate Coffee: Gradually add hot brewed coffee to the batter, mixing until glossy and well combined.

Step 06

Bake Cake: Pour batter into prepared pan and bake 35 to 40 minutes or until a toothpick inserted in the center comes out clean. Cool on wire rack.

Step 07

Prepare Ganache: Heat heavy cream with salt to just boiling, pour over chopped chocolate, let sit 2 minutes, then stir until smooth.

Step 08

Chill and Whip Ganache: Refrigerate ganache for 45 minutes, then whip with a hand mixer until light and fluffy.

Step 09

Apply Ganache: Spread whipped chocolate ganache generously over the cooled cake surface.

Step 10

Create Rat Figures: Color marzipan or modeling chocolate as desired, sculpt small rat shapes with tails and ears using sculpting tools or toothpicks. Add details and dust with edible silver.

Step 11

Decorate Cake: Arrange the rat figures whimsically on top of the ganache-covered cake.

Tools You’ll Need

  • 9-inch round cake pan
  • Mixing bowls
  • Electric mixer or whisk
  • Sifter
  • Rubber spatula
  • Parchment paper
  • Small sculpting tools or toothpicks

Possible Allergens

Double-check each ingredient for allergens and consult an expert if you're unsure.
  • Contains eggs, dairy, wheat/gluten, and almonds if marzipan is used. May contain soy from chocolate. Substitute marzipan for modeling chocolate if allergic to nuts.

Nutritional Information (per serving)

This data is for informational purposes and shouldn't replace professional advice.
  • Calorie Count: 410
  • Total Fat: 22 grams
  • Total Carbohydrates: 52 grams
  • Protein Content: 5 grams