This Rich White Chocolate Mousse Tart is an elegant dessert that looks like it came straight from a patisserie window. With a buttery tart shell, smooth white chocolate mousse filling, and a glossy finish, this dessert is both luxurious and surprisingly simple to make.
Whether you’re hosting a dinner party, planning a café-style menu, or looking for a dessert to impress at high tea, this tart delivers on flavor and presentation. Each bite melts in your mouth — sweet, creamy, and perfectly balanced.
Recipe Overview
Prep Time: 25 minutes
Cook Time: 15 minutes
Chill Time: 3 hours
Total Time: 3 hours 40 minutes
Servings: 8–10 slices

Ingredients
For the Tart Shell:
1 ¼ cups all-purpose flour
½ cup unsalted butter, cold and cubed
¼ cup powdered sugar
1 egg yolk
1–2 tbsp cold water
For the White Chocolate Mousse:
1 cup heavy cream
6 oz white chocolate, finely chopped
1 tsp vanilla extract
1 ½ tsp gelatin powder + 2 tbsp water
For Decoration:
Shaved white chocolate, raspberries, or edible flowers (optional)
Instructions
- Make the tart shell: Combine flour, sugar, and butter in a food processor until crumbly. Add egg yolk and water, pulsing until dough forms. Shape into a disk, wrap, and refrigerate 30 minutes.
- Bake: Roll out dough and press into a tart pan. Prick with a fork and bake at 350°F (175°C) for 15–18 minutes until golden. Cool completely.
- Prepare the mousse: Bloom gelatin in water. Heat half the cream until warm, then pour over chopped white chocolate. Stir until melted. Add vanilla and dissolved gelatin. Cool slightly.
- Whip and fold: Whip remaining cream to soft peaks, then gently fold into cooled white chocolate mixture until smooth.
- Assemble: Pour mousse into the cooled tart shell. Smooth the top and refrigerate for 3 hours or until set.
- Decorate: Top with shaved white chocolate, berries, or edible flowers before serving.

Pro Tips & FAQs
Can I make this ahead?
Yes — the tart can be prepared 24 hours in advance and kept refrigerated until serving.
What’s the best chocolate to use?
Use high-quality white chocolate with at least 30% cocoa butter for a smooth, rich mousse texture.
Can I make mini versions?
Absolutely! This recipe makes 8–10 small tartlets — perfect for tea parties or buffet-style dessert tables.

Nutrition Summary
Silky white chocolate mousse in a buttery crust — an elegant, rich dessert perfect for any special occasion.
| Serving Size | Calories | Protein | Carbs | Fat | Fiber | Sugar |
|---|---|---|---|---|---|---|
| 1 slice | 350 | 5g | 32g | 22g | 1g | 20g |
Disclaimer: Nutrition facts are estimated and may vary depending on ingredients used.
