🫐🍰 Blackberry Mousse Layer Cake

Blackberry Mousse Layer Cake is an elegant dessert featuring layers of soft vanilla cake, silky blackberry mousse, and fresh berry flavor. It’s light, creamy, and beautifully balanced with a sweet-tart blackberry filling—perfect for birthdays, celebrations, or summer gatherings.

Prep Time

• Prep: 45 minutes
• Chill: 6 hours or overnight
• Bake: 25 minutes
• Total: About 7 hours

Servings

10–12 slices

Ingredients

Vanilla Cake Layer

• 1½ cups all-purpose flour
• 1½ teaspoons baking powder
• ¼ teaspoon salt
• ½ cup unsalted butter, softened
• ¾ cup sugar
• 3 large eggs
• 2 teaspoons vanilla extract
• ½ cup milk

Blackberry Mousse

• 3 cups fresh or frozen blackberries
• ½ cup sugar (adjust to taste)
• 1 tablespoon lemon juice
• 2 teaspoons gelatin powder
• 3 tablespoons cold water
• 1½ cups heavy whipping cream
• ¼ cup powdered sugar
• 1 teaspoon vanilla extract

Optional Topping

• Fresh blackberries
• Whipped cream
• Mint leaves
• Powdered sugar

Instructions

1. Bake the Cake Layer

1. Preheat oven to 350°F (175°C).
2. Grease and line an 8-inch springform pan.
3. Whisk flour, baking powder, and salt together.
4. Beat butter and sugar until light and fluffy.
5. Add eggs one at a time, then mix in vanilla.
6. Add flour mixture alternately with milk.
7. Spread batter into pan.
8. Bake for 25–30 minutes until golden and set.
9. Cool completely.

2. Make Blackberry Puree

1. Cook blackberries, sugar, and lemon juice over medium heat for 5–8 minutes.
2. Blend and strain to remove seeds.
3. Cool slightly.

3. Prepare the Mousse

1. Sprinkle gelatin over cold water and let bloom for 5 minutes.
2. Warm blackberry puree and stir in gelatin until dissolved.
3. Cool to room temperature.
4. Whip heavy cream with powdered sugar and vanilla until soft peaks form.
5. Fold blackberry mixture gently into whipped cream.

4. Assemble the Cake

1. Place cooled cake layer in a springform pan.
2. Pour blackberry mousse over the cake.
3. Smooth the top.
4. Refrigerate for at least 6 hours until set.

5. Decorate

• Remove from springform pan.
• Top with whipped cream, fresh blackberries, and mint.
• Dust lightly with powdered sugar if desired.

Variations

🍫 Blackberry Chocolate Mousse Cake

Add:

• Chocolate cake base
• Chocolate curls on top

🍋 Lemon Blackberry Mousse Cake

Add:

• Lemon zest to cake batter
• Lemon cream layer

🧁 No-Bake Version

Use:

• Crushed cookie crust instead of cake
• No baking required

Storage

• Refrigerator: Keeps for up to 4 days.
• Freezer: Freeze well-covered for up to 1 month; thaw overnight in the refrigerator.

Tips for the Perfect Mousse Cake

• Strain blackberry puree for a smooth, professional texture.
• Make sure puree is cool before folding into whipped cream.
• Chill overnight for the cleanest slices.
• Dip your knife in hot water before slicing for neat layers.