If you have a sweet tooth and love decadence in every bite, you are going to fall head over heels for this Rich White Chocolate Mousse Tart Recipe. It boasts a perfectly buttery crust that cradles a luxuriously smooth and creamy white chocolate mousse, making it an absolute showstopper dessert for any occasion. It’s the kind of treat that feels elegant yet comforting, that brightens a celebration or simply transforms an ordinary day into something special. Trust me, once you make this, it will surely become one of your favorites to share with family and friends.

Ingredients You’ll Need
Gathering the right ingredients is the first joyful step toward making this tart a reality. The list is wonderfully simple, yet each item plays a starring role in delivering the perfect balance of flavor, texture, and visual appeal.
- 1 1/4 cups all-purpose flour: Provides the sturdy base for the tart crust with just the right crumb.
- 1/4 cup powdered sugar: Sweetens the crust delicately without overpowering the mousse.
- 1/2 cup unsalted butter, cold and cubed: Adds richness and flakiness to the crust for that melt-in-your-mouth feel.
- 1 large egg yolk: Acts as a binder to hold the crust together perfectly.
- 1-2 tablespoons cold water: Helps bring the dough together without making it tough.
- 8 oz white chocolate, chopped: The star ingredient that lends the mousse its ultra-rich and creamy character.
- 1 cup heavy cream: Whipped to airy perfection, it balances the white chocolate’s sweetness beautifully.
- 1 teaspoon vanilla extract: Enhances the flavors and adds a warm, aromatic note.
- Pinch of salt: Just enough to sharpen the overall flavor and bring out the sweetness.
- White chocolate shavings or curls (optional): Gorgeous garnish that doubles as a taste teaser.
- Fresh berries or mint leaves (optional): Adds pops of color and freshness for a stunning finish.
How to Make Rich White Chocolate Mousse Tart Recipe
Step 1: Prepare the Oven and Dough
Start by heating your oven to 350°F (175°C). This simple step ensures your crust will bake evenly to that perfect golden hue.
Step 2: Make the Tart Crust
In a mixing bowl, whisk together the flour and powdered sugar. Add the cold, cubed butter and use a pastry cutter or your fingertips to work it in until the mixture becomes coarse crumbs. This technique creates that crumbly, buttery texture crucial for the base.
Step 3: Bring the Dough Together
Mix in the egg yolk and one tablespoon of cold water until the dough just clings together. If needed, add a tiny bit more water—just enough to make the dough easy to handle. Shape it into a disk, wrap it in plastic wrap, and pop it in the fridge for 30 minutes to chill.
Step 4: Roll and Form the Crust
On a lightly floured surface, roll out your chilled dough to fit a 9-inch tart pan. Press the dough gently and evenly into the pan, trimming the edges and pricking the base with a fork to keep air bubbles at bay.
Step 5: Bake the Tart Shell
Bake your crust for 15 to 18 minutes until it is a beautiful golden color. Once baked, let it cool completely before adding the luscious filling.
Step 6: Melt the White Chocolate
Gently melt the white chocolate using a double boiler or microwave in short bursts, stirring frequently. Let it cool slightly so it does not melt the whipped cream later on.
Step 7: Whip the Cream
Whip the heavy cream along with vanilla extract and a pinch of salt until soft peaks form. This airy whipped cream is the key to making the mousse light and fluffy.
Step 8: Combine Chocolate and Cream
Carefully fold the melted white chocolate into the whipped cream. This folding technique keeps the mousse silky and smooth without losing its lightness.
Step 9: Assemble the Tart
Pour the creamy mixture into the cooled tart shell and gently smooth the surface. Pop the tart in the refrigerator and let it chill for at least 4 hours so the mousse fully sets into that perfect creamy texture.
Step 10: Garnish and Serve
Before serving, adorn your creation with white chocolate shavings, fresh berries, or a few mint leaves to add a pop of color and an extra layer of flavor.
How to Serve Rich White Chocolate Mousse Tart Recipe

Garnishes
White chocolate shavings are a classic garnish that enhance the tart’s decadence, while fresh berries like raspberries or blueberries bring a fresh tartness that complements the sweet mousse beautifully. A couple of mint leaves add both fragrance and a burst of green for visual appeal.
Side Dishes
This tart pairs wonderfully with a light, crisp salad or a fruit compote if you want to keep the meal balanced but indulgent. You can also serve it with a small scoop of tart lemon sorbet or a dollop of freshly whipped cream to keep the richness feeling fresh.
Creative Ways to Present
Try serving individual slices with an elegant dusting of powdered sugar or a drizzle of raspberry coulis for an extra wow factor. Alternatively, place mini tartlets on a dessert tray for a party—these personal-sized versions are guaranteed conversation starters!
Make Ahead and Storage
Storing Leftovers
Once assembled, store your Rich White Chocolate Mousse Tart Recipe in the refrigerator, covered tightly with plastic wrap or in an airtight container to maintain freshness. It should keep beautifully for up to three days.
Freezing
If you want to make this tart in advance, you can freeze it after chilling. Wrap it well with plastic wrap and aluminum foil to prevent freezer burn. When ready to enjoy, thaw it overnight in the fridge for the best taste and texture.
Reheating
This rich dessert is best served chilled, so reheating is not recommended. Instead, let frozen or refrigerated pieces come to room temperature for 15 to 20 minutes before serving to soften slightly and unlock all the wonderful flavors.
FAQs
Can I use milk chocolate instead of white chocolate in this recipe?
You could, but it will alter the flavor and texture significantly. White chocolate provides a creamy sweetness that milk chocolate’s richer cocoa content might overshadow. For the classic Rich White Chocolate Mousse Tart Recipe, sticking to white chocolate is your best bet.
Is it necessary to chill the tart shell before baking?
While the recipe does not call for it explicitly, chilling the dough before rolling and baking helps prevent shrinkage and promotes a tender yet firm crust. It’s a small step that makes a big difference.
Can I make the mousse filling dairy-free?
Replacing heavy cream with a non-dairy whipped topping can work, but results might vary since cream plays a key role in creating the mousse’s light texture. Experiment with coconut cream for a similarly rich alternative if needed.
How long can the Rich White Chocolate Mousse Tart Recipe be refrigerated?
The tart keeps well in the fridge for about three days. Beyond that, the texture and flavor may start to deteriorate, so it’s best enjoyed fresh.
Can I use a different shaped tart pan?
Absolutely! While a 9-inch round tart pan is standard, you can use square or mini tart pans too. Just keep in mind that baking times might vary slightly depending on thickness and shape.
Final Thoughts
This Rich White Chocolate Mousse Tart Recipe is such a delightful treat that merges simplicity with elegance in every forkful. It’s perfect for those moments when you want to impress without stress, or when you simply need a sweet escape. Give it a try, and I promise you’ll be gifting yourself a new favorite dessert that never fails to bring smiles around the table.
Print
Rich White Chocolate Mousse Tart Recipe
- Prep Time: 25 minutes
- Cook Time: 18 minutes
- Total Time: 4 hours 43 minutes
- Yield: 8 servings
- Category: Dessert
- Method: Baking
- Cuisine: French
- Diet: Vegetarian
Description
This Rich White Chocolate Mousse Tart features a buttery, flaky crust filled with a smooth and luxurious white chocolate mousse. Perfect for celebrations or a decadent dessert, it’s garnished with optional white chocolate shavings and fresh berries for an elegant presentation.
Ingredients
For the Tart Crust
- 1 1/4 cups all-purpose flour
- 1/4 cup powdered sugar
- 1/2 cup unsalted butter, cold and cubed
- 1 large egg yolk
- 1–2 tablespoons cold water
For the Mousse Filling
- 8 oz white chocolate, chopped
- 1 cup heavy cream
- 1 teaspoon vanilla extract
- Pinch of salt
For Garnish (Optional)
- White chocolate shavings or curls
- Fresh berries or mint leaves
Instructions
- Preheat Oven: Preheat your oven to 350°F (175°C) to prepare for baking the tart crust.
- Prepare Dry Ingredients: In a mixing bowl, combine all-purpose flour and powdered sugar.
- Incorporate Butter: Add cold cubed unsalted butter to the flour mixture and use a pastry cutter or fingers to blend until the mixture resembles coarse crumbs.
- Add Egg and Water: Mix in the egg yolk and start with 1 tablespoon of cold water. Add more water if needed, mixing until the dough comes together.
- Chill Dough: Form dough into a disk, wrap it tightly in plastic wrap, and chill it in the refrigerator for 30 minutes to firm up.
- Roll and Shape Dough: On a lightly floured surface, roll out the dough to fit a 9-inch tart pan. Press dough into the pan and trim any excess. Prick the base with a fork to prevent bubbling.
- Bake Crust: Bake the tart crust for 15-18 minutes until golden brown. Remove and let it cool completely.
- Melt White Chocolate: Gently melt the chopped white chocolate using a double boiler or microwave in short bursts, stirring until smooth. Allow chocolate to cool slightly.
- Whip Cream: Whip heavy cream with vanilla extract and a pinch of salt until soft peaks form, creating a light, fluffy texture.
- Combine Chocolate and Cream: Carefully fold the melted white chocolate into the whipped cream until fully combined and smooth.
- Assemble Tart: Pour the white chocolate mousse into the cooled tart shell, smoothing the surface.
- Chill Tart: Refrigerate the assembled tart for at least 4 hours to allow the mousse to set firmly.
- Garnish and Serve: Just before serving, garnish with white chocolate shavings, fresh berries, or mint leaves, if desired, to add color and texture.
Notes
- Ensure the butter is very cold when making the crust for a flaky texture.
- Be careful not to overheat the white chocolate to prevent it from seizing.
- Whip the cream just until soft peaks form to keep the mousse light and airy.
- You can substitute fresh fruits like raspberries or strawberries for garnish based on seasonal availability.
- The tart is best served chilled and within 2 days for optimal freshness.

