Frozen White Chocolate Mousse Cake
Frozen white chocolate mousse cake with a vanilla wafer crust, Grand Marnier whipped cream, chopped pistachios, and fresh raspberry sauce. An elegant make-ahead dessert.
YIELD
1 cakePREP
40 minCOOK
0 minREADY
6 hrsThis frozen mousse cake is the kind of showstopper you pull from the freezer looking completely unfazed while your guests lose their minds. A buttery vanilla wafer crust holds a cloud of white chocolate mousse laced with Grand Marnier and topped with bright green pistachios.
The Italian meringue base is what gives this mousse its silky, stable texture. Boiling sugar syrup to the soft-ball stage and beating it into whipped egg whites creates a cooked meringue that’s safe to eat and holds its structure through freezing without turning icy or grainy.
Folding the melted white chocolate into the meringue while both are still slightly warm keeps everything smooth. If the chocolate is too hot it deflates the whites; too cool and it seizes into clumps. Aim for barely warm to the touch.
The raspberry sauce brings necessary acidity. White chocolate and whipped cream are rich and sweet, and that tart, seedy-bright puree cuts through the richness and wakes up every bite.
Pro Tips
- Use real white chocolate (cocoa butter based), not white chips or candy coating. The flavor and melt are noticeably different
- Make sure beaters and bowls are completely clean and dry before whipping egg whites. Any trace of fat prevents them from reaching stiff peaks
- This freezes beautifully for up to three days, making it ideal for dinner parties. Pull it out 5 minutes before slicing for cleaner cuts
- Strain the raspberry sauce through a fine mesh sieve to catch every seed
Variations
- Replace Grand Marnier with Chambord for a raspberry-on-raspberry pairing
- Use a gingersnap crumb crust instead of vanilla wafers for a spicier, warmer base
- Top with fresh raspberries and a dusting of powdered sugar instead of pistachios for a different presentation
Ingredients
Directions
Mix crumbs and butter in medium bowl.
Press into bottom of 8 inch diameter springform pan.
Refrigerate crust while preparing mousse.
Melt 6 ounces white chocolate in top of double boiler set over simmering water, stirring until smooth.
Cool slightly.
Bring sugar and water to boil in heavy medium saucepan, stirring until sugar dissolves.
Continue boiling without stirring until candy thermometer registers 238 degrees (soft-ball stage).
Meanwhile, using electric mixer fitted with clean dry beaters, beat egg whites with cream of tartar in large bowl until soft peaks form.
Gradually beat hot syrup into whites.
Continue beating until mixture is stiff and glossy and bottom of bowl cools to barely lukewarm, about 3 minutes.
Fold in warm chocolate.
Refrigerate chocolate mixture until cool but not set, about 5 minutes.
Whip cream, Grand Marnier and vanilla in another large bowl until soft peaks form.
Gently fold cream into chocolate mixture.
Fold in chopped white chocolate.
Pour mixture into crust; smooth top with spatula.
Sprinkle top with chopped pistachios.
Freeze until firm, about 6 hours.
(Can be prepared 3 days ahead; cover with plastic.)
Remove pan sides.
Cut dessert into wedges.
Serve with raspberry sauce.
For raspberry sauce: Purée raspberries in food processor or blender.
Strain into medium bowl to remove seeds.
Stir in sugar and Grand Marnier.
Refrigerate until well chilled, about 1 hour.
(Can be prepared 3 days ahead; cover).
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