This lemon curd mousse is light, creamy, and full of bright citrus flavor. Made with lemon curd, whipped cream, and fluffy meringue, it's an easy no-bake lemon dessert that's perfect for making ahead.
Add 1¼ cups heavy whipping cream to a large mixing bowl and whisk until stiff peaks form, about 4 minutes.
Gently fold 1¼ cups lemon curd into the whipped cream until smooth and fully combined. Set aside.
Place 2 large egg whites, ⅓ cup granulated sugar, ¼ teaspoon cream of tartar, and ¼ teaspoon kosher salt in a heatproof bowl.
Bring a saucepan with a few inches of water to a gentle simmer. Place the bowl over the saucepan, making sure the bottom does not touch the water. Stir continuously for about 5 minutes, or until the sugar dissolves and the mixture feels very warm to the touch.
Remove the bowl from the heat and beat the mixture with an electric mixer on medium-low speed until foamy, about 2 minutes. Increase the speed and continue beating until stiff peaks form, about 4 minutes.
Carefully fold the beaten egg white mixture into the lemon curd mixture, taking care not to deflate the mousse.
Spoon or pipe the mousse into 4 glasses and refrigerate for at least 1 hour before serving.
Notes
Use Well-Chilled Cream: Chilling the cream and mixing bowl beforehand helps the cream whip up faster and hold its shape better.Fold Gently: I always fold the meringue into the lemon mixture slowly and carefully to keep the mousse light and airy.Taste the Lemon Curd First: The final flavor depends a lot on the lemon curd you use. I like to taste it before starting so I know whether the mousse will be more tart or slightly sweeter.Storage: Store the mousse covered in the refrigerator for up to 3 days. I find the texture and flavor are even better after a few hours of chilling.