This dark chocolate mousse tart brings together contrast and structure in an elegant, layered format. It starts with a crisp shortcrust pastry base, blind-baked on a perforated silicone mat for a clean, even shell. From there, each layer builds texture and flavour — starting with coconut meringue sponge, followed by raspberry jelly and white chocolate mousse.
These insert elements were originally developed for my raspberry and coconut mousse cake, and adapting them to a tart shows just how versatile these components really are. Freezing the insert keeps it sharp and stable when sliced, making this dessert perfect for both visual impact and clean serving.
The whipped dark chocolate mousse finishes everything with depth and softness. Despite the refined look, this tart requires no moulds or special tools — just a careful approach and proper timing. Whether you’re preparing it in stages or assembling ahead for a special occasion, this recipe delivers professional results with accessible techniques.
How to Make This Dark Chocolate Mousse Tart
Watch the full step-by-step video below for assembly, layering, and whipping the mousse to perfection.
This dark chocolate mousse tart is a great example of how professional pastry techniques can be adapted for the home kitchen. With simple tools and careful timing, you can create a clean, elegant result that looks and tastes refined. Whether you’re baking for a special occasion or just want to explore layered patisserie-style desserts, this dark chocolate mousse tart is a reliable, impressive choice that can be made in stages and customised to suit your style.
Dark Chocolate Mousse Tart
Equipment
- Food processor
- Silicone baking mat
- Tart ring or tart tin
- Perforated silicone mat
- Baking tray
- Mixing bowls
- Hand or stand mixer
- Stick blender
- Saucepan
Ingredients
Coconut Meringue Sponge
- 165 g egg whites
- 70 g caster sugar
- Pinch cream of tartar
- 55 g almond meal
- 35 g plain flour
- 125 g icing sugar
- 90 g desiccated coconut
Raspberry Jelly
- 6 g powdered gelatine
- 30 g cold water
- 70 g sugar
- 10 g cornstarch
- 250 g raspberry purée
White Chocolate Mousse
- 3 g powdered gelatine
- 15 g cold water
- 185 g heavy cream 33% – part 1
- 180 g white chocolate
- 10 g coconut or raspberry liqueur
- 200 g heavy cream 35% – part 2
Dark Chocolate Mousse
- 4 g powdered gelatine
- 20 g water
- 180 g milk
- 25 g honey
- 180 g dark chocolate 65%
- 360 g thickened cream 33–36% fat
Instructions
Coconut Meringue Sponge
- Preheat the oven to 165°C fan-forced.
- Whip the egg whites with sugar and cream of tartar until glossy meringue forms.
- Sift and mix icing sugar, flour, almond meal, and desiccated coconut.
- Gently fold the dry mix into the meringue without deflating.
- Spread or pipe 1 cm thick on silicone mat and bake for 15 minutes. Cool completely.
- Cut sponge using rings to match tart base size. Set aside.
Raspberry Jelly
- Bloom gelatine in cold water.
- Mix sugar and cornstarch, then whisk into cold raspberry purée.
- Bring purée to a boil, simmer 1 minute, then add gelatine and stir to dissolve.
- Pour raspberry jelly over sponge in rings to about 1 cm thickness. Freeze until firm.
White Chocolate Mousse
- Bloom gelatine in water.
- Heat cream (part 1) to 80°C and stir in gelatine until dissolved.
- Pour hot cream over white chocolate and emulsify with a stick blender.
- Add liqueur and blend until fully incorporated.
- Semi-whip cream (part 2) and refrigerate.
- When base cools to 28°C, fold in the whipped cream.
- Pour mousse into moulds with frozen insert. Freeze fully before unmoulding.
Dark Chocolate Mousse
- Bloom gelatine in water.
- Heat milk and honey to a simmer.
- Remove from heat, add gelatine, and stir to dissolve.
- Pour hot mixture over dark chocolate and blend until smooth.
- Add cream and blend again. Cover and refrigerate for at least 6 hours or overnight.
- Once chilled, whip the dark chocolate mousse until light and fluffy.
Assembly
- Place shortcrust base on tray.
- Add frozen insert into shell.
- Pipe or spoon whipped dark chocolate mousse on top.
- Decorate as shown in the video or to your preference.
Video
Dark Chocolate Mousse Tart Cross-Cut
❓ FAQ: Dark Chocolate Mousse Tart
Can I make the dark chocolate mousse in advance?
Yes. The mousse needs to chill for at least 6 hours or overnight before whipping. You can prepare it the day before and store it in the fridge with cling film pressed directly on the surface.
Do I need baking weights for the tart shell?
No. The shortcrust pastry is chilled well and baked directly on a perforated silicone mat, which prevents puffing. There’s no need for baking weights or dried beans.
Can I use another base instead of shortcrust?
This recipe is designed for shortcrust because of its structure and clean finish, but you could use pâte sablée or a nut-based crust if preferred. Just ensure it’s baked and fully cooled before assembling.
Can I skip the insert and just use the mousse?
You can — but the insert adds flavour, texture, and structure. The tart is possible with only the mousse, but it will be simpler and less balanced in flavour.
Can I use store-bought jam instead of making the raspberry jelly?
It’s not recommended. Store-bought jam tends to be too sweet and lacks the structure needed to hold as a clean insert. The raspberry jelly in this recipe is balanced, firm, and sets properly for layering.
What chocolate do you use for the mousse?
I use chocolate with 65% cocoa solids. A higher cocoa content gives the mousse in this dark chocolate mousse tart a deep, clean flavour without being too sweet or dense. For best results, avoid compound chocolate or overly sweet blends.
Can I serve this tart at room temperature?
No — the mousse is designed to be served chilled. If left at room temperature too long, it will soften and lose definition. Keep the tart refrigerated and serve straight from the fridge.
Craving more behind-the-scenes moments, step-by-step videos, and sneak peeks of upcoming recipes? Join me on Instagram @andbonbons for a closer look at the process, pastry tips, and plenty of chocolate inspiration.