This 3-ingredient lemon posset is exactly the kind of dessert my mother-in-law pulls out at spring family gatherings and everyone thinks she spent hours on it. In reality, it’s just good cream, sugar, and fresh lemons working a little magic together. The cream thickens all on its own—no eggs, no gelatin, no fancy equipment—into a silky, rich, sweet-tart custard that feels special enough for company but is simple enough to make after work on a Tuesday. If you’ve never had posset before, it’s a classic British-style dessert that relies on citrus to set the cream, and it’s become one of my go-to “secret weapon” recipes when I need something impressive with minimal effort.
Serve this lemon posset well-chilled in small white bowls, ramekins, or even espresso cups, topped with a little fresh lemon zest for color. It’s very rich, so keep portions on the smaller side and pair it with something light and crunchy like shortbread cookies or thin butter biscuits. A plate of fresh berries on the table is perfect for people to add on top if they want a little freshness. For drinks, coffee or hot tea is great after dinner, or a chilled glass of prosecco or sparkling water with a lemon slice keeps the citrus theme going without feeling heavy.
3-Ingredient Lemon PossetServings: 4
Ingredients
2 cups heavy cream (heavy whipping cream, at least 36% fat)
2/3 cup granulated sugar
1/3 cup fresh lemon juice (from about 2–3 lemons), plus extra lemon zest for garnish
Directions
Pour the heavy cream and granulated sugar into a medium saucepan. Before you turn on the heat, give it a quick stir so the sugar isn’t sitting in one spot on the bottom of the pan.
Place the saucepan over medium heat and bring the cream and sugar to a gentle simmer, stirring occasionally so the sugar fully dissolves and nothing scorches. You want small bubbles around the edges, not a rolling boil.
Once it reaches a gentle simmer, adjust the heat as needed to maintain that soft bubbling and let it simmer for about 3 minutes, stirring now and then. The mixture will look smooth and slightly thickened. Turn off the heat.
Immediately stir in the fresh lemon juice, mixing well until the cream looks completely uniform and silky. The lemon juice will start the thickening process as it cools, so don’t worry if it still looks pourable at this point.
Let the mixture sit in the pan for about 10–15 minutes to cool slightly, stirring once or twice to keep it smooth. Meanwhile, set out 4 small white bowls or ramekins on a tray for easier transferring to the fridge.
Carefully pour or ladle the warm lemon cream into the bowls, dividing it evenly. If any bubbles form on top, you can gently pop them with a toothpick or leave them—they’ll mostly settle as it chills.
Refrigerate the bowls uncovered for about 30 minutes, then cover each one lightly with plastic wrap (or cover the whole tray) and chill for at least 3 hours, or until the posset is set and has a thick, creamy, pudding-like texture. For best texture and flavor, chill 4–6 hours or overnight.
Right before serving, finely zest a lemon and sprinkle a little zest over the top of each posset for a bright, sunny look and extra citrus aroma. Serve straight from the fridge, cold and smooth.
Variations & Tips
For a slightly lighter feel, you can replace up to 1/2 cup of the heavy cream with half-and-half, but keep at least 1 1/2 cups as full-fat cream so it still sets properly. To lean into other citrus flavors, swap part of the lemon juice for lime or orange juice (just keep the total amount of juice the same); lemon-lime is especially nice in spring. If you like a stronger lemon punch, add 1–2 teaspoons of finely grated lemon zest into the cream and sugar before heating, then strain the mixture through a fine-mesh sieve before pouring into bowls for a perfectly smooth texture. For a date-night twist, serve the posset in small wine glasses and top with a few raspberries or sliced strawberries. Food safety tips: Always use pasteurized heavy cream and wash your lemons before zesting or juicing. Bring the cream and sugar up to a proper simmer (with visible small bubbles around the edges) to help reduce microbial risk, but avoid boiling vigorously, which can cause the cream to separate. Cool the mixture at room temperature only briefly, then get it into the refrigerator within about 30 minutes. Keep the posset chilled until serving, and store leftovers covered in the fridge for up to 3 days; do not leave it out at room temperature for more than 2 hours.
