Chocolate Hazelnut Mousse

This chocolate mousse skips the classic raw-egg method for a pudding-based approach that’s safer and just as silky. Tempering the eggs with hot milk creates a rich custard base that thickens on the stovetop, then gets stirred with bittersweet chocolate until glossy and smooth.

Frangelico is the quiet hero. That splash of hazelnut liqueur adds warmth and nutty depth without making the mousse boozy. Paired with real chopped bittersweet chocolate (not chocolate chips, which contain stabilizers that prevent smooth melting), you get genuine chocolate-hazelnut flavor rather than something that just tastes sweet.

Folding in whipped topping in two stages is critical. The first third loosens the heavy custard base, and the remaining two-thirds folds in cleanly without deflating all that air. Cool the custard in an ice bath first, or the hot mixture will melt the topping and you’ll end up with chocolate soup.

Three hours of chilling lets the texture firm up into that signature mousse consistency. Sprinkle toasted hazelnuts on top right before serving so they stay crunchy.

Pro Tips

• Use a whisk to combine eggs and sugar, not a spatula. A whisk aerates the eggs slightly and prevents them from scrambling when hot milk hits them.
• Stir constantly while tempering. If you stop stirring for even a few seconds, you get cooked egg bits.
• Chop the chocolate fine. Large chunks don’t melt completely in the still-warm custard.
• Toast the hazelnuts in a 350°F (175°C) oven for 8 to 10 minutes, then rub in a towel to remove skins. Skipping this step gives you bitter, pale hazelnuts.

Variations

• Swap Frangelico for Baileys, Kahlua, or a splash of espresso for different flavor profiles.
• Use white chocolate instead of bittersweet for a completely different mousse.
• Fold in fresh raspberries just before serving for a chocolate-raspberry version.