Use only heavy cream (36–40% fat) and fresh lemon juice for proper setting. Chill thoroughly for at least 4 hours for the best texture, and always strain for a perfectly smooth, restaurant-quality finish.
Keyword 3 ingredient dessert, British dessert, easy elegant dessert, gluten free dessert, lemon custard, lemon posset, Make-Ahead Dessert, no bake lemon dessert