How much mousse does this make?

This batch makes 4 cups of chocolate mousse filling.

Can I make chocolate mousse filling ahead?

Yes. Store it in an airtight container in the refrigerator for up to 3 to 4 days.

Why is my mousse runny?

The chocolate was likely still hot when it met the whipped cream, or the cream didn't reach stiff peaks. Let the melted chocolate cool completely to room temperature before folding it in. Use cold heavy cream with at least 36% milk fat in a chilled bowl. Fold with a rubber spatula instead of stirring, since stirring deflates the cream. The mousse firms up when chilled.

Can I use milk chocolate or chocolate chips?

I wouldn't use either one here. Milk chocolate and most chocolate chips have less cocoa solids and added stabilizers, so the filling doesn't set as firmly. Choose high-quality semi-sweet or bittersweet chocolate with 60% to 72% cacao.

Does this filling need gelatin?

No gelatin is needed. Whipped heavy cream and cooled melted chocolate hold the filling in place.

How is mousse different from ganache?

Mousse is light and airy from whipped cream folded into chocolate, while ganache is denser and fudgier because its cream isn't whipped. I use mousse for a softer cake filling.

Chocolate Mousse Filling with Semi-Sweet Chocolate

By Mason BrooksOct 12, 2026

Prep

15 min

Cook

5 min

Total

20 min

Servings

Level

Easy

Jump to recipe

I make this chocolate mousse filling for cakes and pastries that need to hold their shape. Cooled melted chocolate folds into whipped cream for a light filling with a clear chocolate taste, and it pipes onto cupcakes or spreads between cake layers without gelatin.

Start with semi-sweet or bittersweet chocolate in the 60% to 72% cacao range, then melt it at 50% power in 30-second intervals, stirring between each one, and let it cool at room temperature for about 10 to 15 minutes. Hot chocolate turns whipped cream into a soupy mixture.

The cream and bowl need to be cold before you begin. Beat the cream with powdered sugar and vanilla until stiff peaks form, then stop, because overworked cream goes grainy and stirring the chocolate into it knocks out the air you just whipped in.

I use two bowls and a rubber spatula, even for a small batch. Fold one-third of the whipped cream into the chocolate first, then bring in the rest with broad turns from the bottom of the bowl. Stop when the white streaks are gone and the mousse is one even color.

Why you'll love this recipe

It holds its shape in cake layers and cupcakes. It also works in tart shells, cream puffs or eclairs, and donuts.
The filling is egg-free, so there's no tempering step before you start folding.
A chilled bowl and cold heavy cream give the mousse enough lift to pipe onto cupcakes.
It makes 4 cups. That fills more than one dessert.
You can layer it in glasses with berries, crushed cookies, cake cubes, or other toppings for a no-bake dessert.
You can make the mousse ahead. That helps when a cake has several parts to finish.

Instructions

Put the finely chopped chocolate in a microwave-safe bowl.

Microwave at 50% power in 30-second intervals, stirring between each interval, until the chocolate is melted and smooth.

Set the chocolate aside to cool to room temperature, about 10 to 15 minutes.

Beat the cold heavy cream, powdered sugar, and vanilla extract in a separate large chilled bowl on medium-high speed until stiff peaks form. Do not overmix.

Fold about one-third of the whipped cream into the cooled chocolate with a rubber spatula until just combined.

Fold in the remaining whipped cream gently until no white streaks remain and the mousse is uniform in color and texture. Do not overmix.

Use the mousse as a filling for cakes, cupcakes, or other desserts, or cover and refrigerate if not using it immediately.

FAQ

Use it as a filling in desserts, including cakes and cupcakes. Spoon it into a pre-baked tart shell. Layer it in glasses with the toppings, or pipe it into pastries. Let the finished dessert sit at room temperature for 15 to 20 minutes before serving.

Chocolate Mousse Filling with Semi-Sweet Chocolate

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Desserts Sauces & Dips American Baking