This no-bake lemon mousse is light, creamy, and tangy with fresh lemon flavor. It comes together quickly with whipped cream and cream cheese and chills to a softly set, elegant dessert.
Taste and adjust sweetness or acidity before folding in the whipped cream, as lemons vary. Ensure cream is very cold and cream cheese is fully softened to avoid lumps and achieve maximum volume. Do not overwhip cream or overfold the mousse to maintain a light texture. Refrigerate covered for up to 3 days and add toppings just before serving. Do not freeze. Variations include lemon-berry swirl, Meyer lemon, lemon curd ripple, crunchy base, coconut lemon, limoncello, or mascarpone in place of cream cheese.