This dulce de leche mousse is a rich yet light dessert with lots of milky, buttery caramel flavor. It's made by folding dulce de leche custard into whipped heavy cream, creating a silky, luscious mousse with no gelatin required.
First, whisk the egg yolks, sugar, and salt in a medium bowl until the color is pale yellow.
4 egg yolks, 50 grams granulated sugar, ⅛ teaspoon salt
Place heavy cream in a medium saucepan. Heat on medium-low until it begins to bubble around the edges. Don't let it boil.
300 grams heavy cream
Slowly pour the hot cream into the egg mixture while whisking to temper the egg yolks.
Return the mixture (or custard) to the saucepan. Whisk over low heat for 5-7 minutes, mixing often until it thickens and coats the back of a spoon.
Remove the pan from the heat. Stir in the vanilla extract and dulce de leche until smooth. Then transfer the custard to a large mixing bowl and let cool completely.
1 teaspoon vanilla extract, 200 grams dulce de leche
Next, whip the remaining cold heavy cream In the bowl of a stand mixer fitted with a whisk attachment or with an electric hand mixer until stiff peaks form.
240 grams heavy cream
Gently fold the whipped cream into the cooled custard in 2 additions until no white streaks remain. Don't overmix.
Use a spoon or piping bag with a large tip to portion the mousse into cups or small jars. Cover the jars and refrigerate for 1-3 hours until set.
Once chilled, garnish the mousse cups with a dollop of whipped cream, a drizzle of melted dulce de leche, or cookie crumbs. Serve cold or at room temperature for a softer texture.
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Notes
While the custard thickens in the saucepan, keep an eye on it and stir constantly. If you have a thermometer, it should only reach 175-180°F/82°C.Storage: Store leftover dulce de leche mousse in the refrigerator for 2-3 days. Place plastic wrap directly on the surface of the mousse so a skin doesn't form. For guests, serve after 1 day in the fridge for optimal freshness.Freezing: To freeze, pour the mousse into a popsicle mold or a loaf pan wrapped with cling film to prevent freezer burn. Freeze for up to 2 months. Eat straight from the freezer as ice cream or thaw for 10 minutes or so. Don't freeze and thaw completely because the texture will be watery.