Rat Cake Whipped Chocolate Ganache

Featured in: Fall Baking

This chocolate cake features a rich, moist base enhanced by brewed coffee and cocoa powder. A light, airy whipped chocolate ganache crowns the cake, adding creamy richness. The finishing touch includes playful rat figures shaped from marzipan or modeling chocolate, simple to customize with food coloring and edible dust. Baking requires moderate time and skill, perfect for a dessert with a modern European flair. Tips include nut-free substitutions and optional chili for a spicy note.

Updated on Wed, 12 Nov 2025 15:50:00 GMT
Moist, dark Rat Cake, a decadent layered dessert topped with fluffy whipped chocolate ganache and charming rat figures. Save to Pinterest
Moist, dark Rat Cake, a decadent layered dessert topped with fluffy whipped chocolate ganache and charming rat figures. | yummywithmia.com

A whimsically dark and decadent dessert, this Rat Cake with Whipped Chocolate Ganache celebrates avant-garde patisserie through a moist chocolate base and playful rat-shaped decorations. Combining rich flavors with a touch of mischievous artistry, it offers a unique treat for creative bakers.

I first attempted this recipe for a Halloween gathering and its striking appearance quickly sparked conversations. Guests loved crafting marzipan rats, transforming the kitchen into a creative space filled with laughter and chocolate aromas.

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 for details, Edible silver dust or shimmer optional

Instructions

Prepare Cake Pan:
Preheat oven to 350°F (175°C). Grease and line a 9-inch (23 cm) round cake pan with parchment paper.
Mix Dry Ingredients:
In a large bowl, sift flour, baking powder, baking soda, salt, and cocoa powder.
Add Sugar:
Add granulated sugar and mix well.
Combine Wet Ingredients:
In a separate bowl, whisk eggs, milk, vegetable oil, and vanilla until smooth.
Make Batter:
Pour wet ingredients into dry, mixing until no lumps remain. Gradually add hot coffee, stirring until batter is glossy and well-blended.
Bake Cake:
Pour batter into prepared pan and bake for 35 to 40 minutes. Test with a toothpick: cake is done when it comes out clean. Cool cake completely on wire rack.
Make Ganache:
Place chopped chocolate in a heatproof bowl. Heat heavy cream with a pinch of salt until just boiling, then pour over chocolate. Leave to stand for 2 minutes, then stir until smooth.
Whip Ganache:
Refrigerate ganache for 45 minutes, then whip using hand mixer until light and airy.
Assemble Cake:
Spread whipped ganache generously over cooled cake base.
Shape Rat Decorations:
Knead marzipan or modeling chocolate with food coloring to form small rat figures, tails, and ears. Add details with a toothpick or edible paints. Dust with edible silver for shimmer.
Decorate:
Arrange rat figures on cake in whimsical, chaotic patterns.
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| yummywithmia.com

This cake became a highlight at our family birthdays, especially among the kids who delighted in the edible rat figurines. Together we would shape tails and ears, adding our own creative flair to every batch.

Required Tools

9-inch (23 cm) round cake pan, mixing bowls, electric mixer or whisk, sifter, rubber spatula, parchment paper, small sculpting tools or toothpicks for decorations

Allergen Information

Contains eggs, milk/dairy, wheat/gluten, and almonds if using marzipan. May contain soy present in chocolate. For nut allergies, substitute marzipan with modeling chocolate and check ingredients labels.

Nutritional Information (per serving)

Calories: 410, Total Fat: 22 g, Carbohydrates: 52 g, Protein: 5 g

A slice of Rat Cake displaying a rich, dark chocolate base and adorned with whimsical marzipan rat decorations. Save to Pinterest
A slice of Rat Cake displaying a rich, dark chocolate base and adorned with whimsical marzipan rat decorations. | yummywithmia.com

Finish the Rat Cake with plenty of creative rat decorations and a dusting of edible silver for wow-factor. Slice and serve with confidence: it's sure to surprise your guests!

Common Recipe Questions

How is the cake base kept moist?

Incorporating hot brewed coffee and vegetable oil ensures a tender, moist crumb while enhancing the chocolate flavor.

What makes the ganache whipped and airy?

After chilling, the ganache is whipped with a mixer to introduce lightness and a fluffy texture.

What ingredients are used for the rat decorations?

Marzipan or modeling chocolate is shaped and colored with food gels or dusted with edible shimmer for detail.

Can this dessert accommodate nut allergies?

Yes, by using modeling chocolate instead of marzipan and checking chocolate ingredients for allergens.

What optional flavor twist can be added to the ganache?

A pinch of chili powder adds a subtle spicy depth to the sweet chocolate ganache.

Rat Cake Whipped Chocolate Ganache

A moist chocolate base topped with light whipped ganache and creative marzipan rat decorations.

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

Recipe Type Fall Baking

Skill Level Medium

Culinary Origin Modern European

Total Output 10 Portion Size

Dietary Preferences Vegetarian-Friendly

What You'll Need

Cake Base

01 1 1/2 cups (6.7 oz) 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 (2.3 oz) unsweetened cocoa powder
06 1 1/4 cups (8.8 oz) granulated sugar
07 2 large eggs, room temperature
08 3/4 cup (6 fl oz) whole milk
09 1/2 cup (4 fl oz) vegetable oil
10 2 teaspoons pure vanilla extract
11 3/4 cup (6 fl oz) hot brewed coffee

Whipped Chocolate Ganache

01 8 oz semi-sweet chocolate, chopped
02 1 cup (8 fl oz) heavy cream
03 Pinch of salt

Rat Decorations

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

Steps to Follow

Step 01

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

Step 02

Combine Dry Ingredients: Sift the flour, baking powder, baking soda, salt, and cocoa powder into a large bowl.

Step 03

Add Sugar: Incorporate the granulated sugar into the dry mixture and mix thoroughly.

Step 04

Mix Wet Ingredients: Whisk the eggs, whole milk, vegetable oil, and vanilla extract in a separate bowl until combined.

Step 05

Combine Wet and Dry Mixtures: Pour the wet ingredients into the dry mixture and stir until smooth.

Step 06

Add Hot Coffee: Gradually incorporate the hot brewed coffee, mixing until the batter becomes glossy and well combined.

Step 07

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

Step 08

Prepare Ganache: Place chopped chocolate in a heatproof bowl. Heat cream with salt until just boiling, then pour over chocolate. Let sit for 2 minutes, then stir until smooth.

Step 09

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

Step 10

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

Step 11

Create Rat Decorations: Knead marzipan or modeling chocolate with food coloring to form small rat figures, tails, and ears. Use a toothpick or edible paints to add details, then dust with edible silver shimmer.

Step 12

Assemble Decorations: Arrange the rat figures on the cake in a playful, whimsical pattern.

Tools Required

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

Allergy Warnings

Please review individual ingredients for potential allergens and reach out to a healthcare professional if unsure.
  • Contains eggs, dairy, wheat/gluten, and almonds (if marzipan used); may contain soy.
  • For nut allergies, substitute marzipan with modeling chocolate and verify all chocolate ingredients.

Nutritional Info (per serving)

These details are for reference only and shouldn't replace professional medical consultation.
  • Calories Count: 410
  • Fats: 22 grams
  • Carbohydrates: 52 grams
  • Proteins: 5 grams