Strawberry and White Chocolate Mousse Cake

Why You’ll Love This Recipe

I love this mousse cake because it looks impressive while using familiar flavors that work beautifully together. White chocolate gives me a rich, velvety mousse, while strawberries keep the dessert fresh and fruity.

I also appreciate that I can prepare the cake ahead of time. The mousse needs several hours to chill and set, so I can make the dessert the day before and decorate it with fresh strawberries shortly before serving.

Ingredients

(Tip: You’ll find the full list of ingredients and measurements in the recipe card below.)

For the cake base:

• All-purpose flour
• Baking powder
• Salt
• Unsalted butter, softened
• Granulated sugar
• Large eggs
• Whole milk
• Vanilla extract

For the strawberry layer:

• Fresh strawberries
• Granulated sugar
• Fresh lemon juice
• Cornstarch, optional

For the white chocolate mousse:

• White chocolate, finely chopped
• Heavy whipping cream
• Mascarpone or cream cheese
• Vanilla extract
• Gelatin powder
• Cold water

For decorating:

• Fresh strawberries
• White chocolate curls or shavings
• Whipped cream, optional
• Fresh mint, optional

Directions

I start by preheating my oven to 350°F (175°C). I grease a springform cake pan and line the bottom with parchment paper.

For the cake base, I whisk together the flour, baking powder, and salt. In a separate bowl, I beat the softened butter and sugar until pale and fluffy.

I add the eggs one at a time, followed by the vanilla. I gradually incorporate the dry ingredients and milk, mixing only until I have a smooth batter.

I spread the batter in my prepared pan and bake it for about 18–25 minutes, or until lightly golden and a toothpick inserted into the center comes out clean. I let the cake cool completely before assembling the mousse layers.

For the strawberry layer, I chop the strawberries and combine them with sugar and lemon juice in a saucepan. I cook them gently until they soften and release their juices.

If I want a thicker strawberry filling, I stir in a small amount of cornstarch mixed with water and simmer briefly. I then remove the mixture from the heat and let it cool completely.

To prepare the mousse, I sprinkle the gelatin over cold water and leave it for several minutes to bloom.

I gently heat a portion of the heavy cream until hot but not boiling, then pour it over the chopped white chocolate. I let it stand briefly before stirring until completely smooth.

I dissolve the bloomed gelatin into the warm white chocolate mixture. I then allow the mixture to cool until it’s no longer hot.

In another bowl, I beat the mascarpone or cream cheese until smooth. I gradually mix in the white chocolate mixture.

I whip the remaining heavy cream until soft peaks form, then gently fold it into the white chocolate mixture. I work carefully because I want my mousse to remain light and airy.

To assemble the cake, I keep the cooled cake base inside the springform pan. I spread the cooled strawberry mixture over the cake, leaving a small border around the edge if I want cleaner-looking layers.

I spoon the white chocolate mousse over the strawberries and smooth the surface. I cover the cake and refrigerate it for at least 6 hours, although I prefer leaving it overnight.

Once completely set, I carefully remove the cake from the pan and decorate it with fresh strawberries, white chocolate curls, and whipped cream if I’m using it.

Servings and Timing

I usually cut this mousse cake into 10–12 slices.

• Prep time: 40 minutes
• Cake baking time: 18–25 minutes
• Cooling and assembly time: about 1 hour
• Chilling time: at least 6 hours
• Total time: approximately 8 hours
• Servings: 10–12

Variations

I sometimes replace the strawberry layer with raspberries when I want a more tart contrast to the sweet white chocolate. A combination of strawberries and raspberries also works beautifully.

For extra strawberry flavor, I fold a little strawberry puree into part of the mousse and create pink and white layers.

When I want a different base, I use a crushed biscuit crust instead of sponge cake. I combine crushed digestive biscuits or graham crackers with melted butter and press the mixture firmly into the bottom of the pan.

I can also use a chocolate cake base when I want a stronger contrast between the rich cocoa flavor, white chocolate mousse, and strawberries.

For individual desserts, I assemble the cake components in glasses or small dessert jars. I find this version convenient when I don’t want to worry about slicing the mousse cake neatly.

Storage/Reheating

I store my strawberry and white chocolate mousse cake covered in the refrigerator for up to 3 days. Since the mousse contains cream and soft cheese, I keep the cake properly chilled until I’m ready to serve it.

I don’t reheat this cake. I serve it cold directly from the refrigerator or let individual slices sit for a few minutes before eating.

I prefer adding fresh strawberry decorations shortly before serving because cut strawberries can release moisture as they sit.

I don’t usually freeze the fully decorated cake because fresh strawberries can become watery after thawing. If necessary, I can freeze the undecorated mousse cake for up to about 1 month and thaw it slowly in the refrigerator before decorating.

FAQs

How do I get white chocolate mousse to set properly?

I use gelatin to stabilize my mousse and make sure it dissolves completely in the warm white chocolate mixture. I also give the assembled cake at least 6 hours in the refrigerator. For the cleanest slices, I prefer chilling it overnight.

Can I make strawberry and white chocolate mousse cake ahead of time?

Yes. I find this cake ideal for preparing ahead because it needs a long chilling period. I usually make it the day before serving and add the fresh strawberries and other decorations shortly before bringing it to the table.

Can I use frozen strawberries?

I can use frozen strawberries for the cooked strawberry layer. I cook off any excess liquid or thicken the mixture slightly if necessary. For decorating, I prefer fresh strawberries because they have a firmer texture and more attractive appearance.

Why has my white chocolate mousse become grainy?

I find that overheating white chocolate can cause texture problems. I finely chop the chocolate and melt it gently using hot cream rather than exposing it to excessive direct heat. I also make sure my ingredients aren’t dramatically different in temperature when I combine them.

How do I get clean slices of mousse cake?

I chill the cake thoroughly before slicing. I dip a sharp knife into hot water, wipe it dry, and make one clean cut. I repeat the process before each slice so I don’t drag mousse or strawberry filling through the different layers.

Conclusion

Strawberry and white chocolate mousse cake is a dessert I love when I want something that looks impressive while combining familiar, crowd-pleasing flavors. The soft cake, fruity strawberry layer, and silky white chocolate mousse give me several textures in every bite, while fresh berries balance the chocolate’s sweetness. Since I can prepare the cake the day before and simply decorate it when I’m ready to serve, it’s an elegant make-ahead dessert I enjoy for birthdays, celebrations, dinner parties, and summer gatherings.

Strawberry and White Chocolate Mousse Cake

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Strawberry and white chocolate mousse cake layers a soft cake base with a fruity strawberry filling and silky white chocolate mousse. Fresh berries provide a bright, slightly tart contrast to the rich chocolate for an elegant make-ahead dessert.

• Author: Laura
• Prep Time: 40 minutes
• Cook Time: 18–25 minutes
• Total Time: Approximately 8 hours
• Yield: 10–12 slices
• Category: Dessert
• Method: Baking and Chilling
• Cuisine: European
• Diet: Vegetarian

Ingredients

• All-purpose flour
• Baking powder
• Salt
• Unsalted butter, softened
• Granulated sugar, for the cake base
• Large eggs
• Whole milk
• Vanilla extract, for the cake base
• Fresh strawberries, for the strawberry layer
• Granulated sugar, for the strawberry layer
• Fresh lemon juice
• Cornstarch, optional
• White chocolate, finely chopped
• Heavy whipping cream
• Mascarpone or cream cheese
• Vanilla extract, for the mousse
• Gelatin powder
• Cold water
• Fresh strawberries, for decorating
• White chocolate curls or shavings
• Whipped cream, optional
• Fresh mint, optional

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Instructions

1. Preheat the oven to 350°F (175°C). Grease a springform cake pan and line the bottom with parchment paper.
2. Whisk together the all-purpose flour, baking powder, and salt in a bowl.
3. In a separate bowl, beat the softened butter and granulated sugar until pale and fluffy. Add the eggs one at a time, followed by the vanilla extract.
4. Gradually incorporate the dry ingredients and whole milk, mixing only until a smooth batter forms.
5. Spread the batter evenly in the prepared pan and bake for 18–25 minutes, until lightly golden and a toothpick inserted into the center comes out clean. Allow the cake to cool completely.
6. For the strawberry layer, chop the strawberries and combine them with granulated sugar and fresh lemon juice in a saucepan. Cook gently until the berries soften and release their juices.
7. For a thicker strawberry filling, stir in a small amount of cornstarch mixed with water and simmer briefly until thickened. Remove from the heat and cool completely.
8. For the mousse, sprinkle the gelatin powder over cold water and leave it for several minutes to bloom.
9. Gently heat a portion of the heavy cream until hot but not boiling. Pour it over the finely chopped white chocolate, leave briefly, then stir until completely smooth.
10. Stir the bloomed gelatin into the warm white chocolate mixture until fully dissolved, then allow the mixture to cool until no longer hot.
11. Beat the mascarpone or cream cheese until smooth, then gradually mix in the cooled white chocolate mixture.
12. Whip the remaining heavy cream until soft peaks form. Gently fold it into the white chocolate mixture until the mousse is light and evenly combined.
13. Keep the cooled cake base in the springform pan and spread the cooled strawberry mixture over it, leaving a small border around the edge if desired.
14. Spoon the white chocolate mousse over the strawberry layer and smooth the surface. Cover and refrigerate for at least 6 hours, or preferably overnight, until completely set.
15. Carefully remove the chilled cake from the pan and decorate with fresh strawberries, white chocolate curls or shavings, optional whipped cream, and fresh mint before serving.

Notes

• Chill the assembled cake overnight for the firmest mousse and cleanest slices.
• Frozen strawberries can be used for the cooked fruit layer, but fresh strawberries are preferable for decorating.
• Raspberries can replace the strawberries for a more tart contrast, or use a combination of both berries.
• Fold a little strawberry puree into part of the mousse to create contrasting pink and white mousse layers.
• A crushed graham cracker or digestive biscuit crust can replace the cake base.
• A chocolate cake base can be used for a richer chocolate and strawberry variation.
• Avoid overheating the white chocolate, and combine components at similar temperatures to help keep the mousse smooth.
• For neat slices, dip a sharp knife into hot water, wipe it dry, and repeat before each cut.
• Store the cake covered in the refrigerator for up to 3 days and add fresh strawberry decorations shortly before serving.
• The undecorated mousse cake can be frozen for up to about 1 month. Thaw slowly in the refrigerator before decorating and serving.

Nutrition

• Serving Size: 1 slice
• Calories: 480 kcal
• Sugar: 34 g
• Sodium: 180 mg
• Fat: 31 g
• Saturated Fat: 19 g
• Unsaturated Fat: 10 g
• Trans Fat: 0 g
• Carbohydrates: 44 g
• Fiber: 2 g
• Protein: 7 g
• Cholesterol: 105 mg