If sunshine could be captured in dessert form, this key lime posset recipe would be it. With just 5 simple ingredients, this no-bake treat delivers bold citrus flavor and silky-smooth texture in every spoonful. Served in hollowed-out lime shells or chilled glasses, this lime posset—a British-style chilled dessert traditionally made by curdling cream with citrus juice— is a show-stopping, fuss-free dessert that’s made for summer entertaining.
A classic posset is made of just cream, sugar, and citrus juice, which naturally thickens the mixture without the need for eggs or gelatin. The result is a luxuriously creamy posset dessert that tastes like bright, tangy citrus and is indulgent without feeling heavy. In our version, the tangy lime juice pairs perfectly with rich cream and Greek yogurt, while optional crushed graham crackers and mint leaves add that classic key lime pie flair. Refreshing, elegant, and ready in an hour—this is your new go-to for warm weather desert recipes using limes.
To make this lime posset recipe, start by whisking together heavy cream and sugar in a medium saucepan over high heat. Bring the mixture to a rolling simmer, then stir in freshly squeezed lime juice. Let it cook for a few minutes, until it thickens slightly and coats the back of a spoon. Remove from heat and let the mixture cool for about 10 minutes. Whisk in Greek yogurt and a pinch of salt, then let it cool for a few minutes more.
Pour the mixture into hollowed-out lime shells or small glasses. Chill until set, about 15–20 minutes. Before serving, garnish with crushed graham crackers, lime zest, and mint leaves if desired.
