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Close-up of three moist yellow sponge layers with opaque ivory Vanilla Mousse Cake Filling.

Vanilla Mousse Cake Filling: The Secret to Professional Triple-Layer Cakes

Create a professional-grade Vanilla Mousse Cake Filling that is stable, opaque ivory, and perfectly aerated. Designed for tall triple-layer yellow sponge cakes with a clean white frosting finish and exceptional structural integrity.
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Prep Time 45 minutes
Cook Time 30 minutes
Total Time 1 hour 15 minutes
Servings: 12 slices
Course: Cake Filling, Desserts
Cuisine: American, French Patisserie
Calories: 450
Ingredients Equipment Method Notes

Ingredients
  

Cake Base
  • 3 cups (375g) Cake Flour Sifted
  • 1 cup (225g) Unsalted Butter Softened
  • 2 cups (400g) Granulated Sugar
  • 4 units (200g) Large Eggs Room temperature
  • 1 cup (240ml) Whole Milk
Mousse Filling
  • 2 cups (480ml) Heavy Whipping Cream Cold
  • 1 cup (170g) White Chocolate Chips High quality
  • 2 tsp (10ml) Vanilla Bean Paste For ivory color
  • 1 tsp (5g) Gelatin Powder Optional for extra stability

Equipment

  • 1 Revolving Cake Stand For even frosting application.
  • 1 Offset spatula To spread mousse evenly.
  • 3 Three 8-inch Cake Pans For the sponge layers.

Method
 

Bake the Sponge
  1. Cream softened butter and sugar for 5 minutes until pale and fluffy.
  2. Add eggs one at a time, beating well after each addition to maintain emulsion.
  3. Alternately add flour and milk. Bake at 350°F (175°C) for 25-30 minutes until golden.
Make the Mousse
  1. Melt white chocolate with 1/2 cup cream until smooth. Cool to room temperature.
  2. Whip remaining cream and vanilla bean paste until stiff peaks form.
  3. Gently fold the white chocolate into the whipped cream until dense yet aerated.

Notes

Ensure white chocolate is fully cooled before folding into cream.
Use a hot knife for clean side-profile slices.