Lemon Posset Brûlée: A Silky Make-Ahead Dessert

Lemon posset brûlée is a British-inspired dessert of cream set with lemon juice, finished with a crisp layer of caramelized sugar. The posset needs no eggs or gelatin: simmering cream with sugar, then adding lemon, creates a smooth, tangy custard that chills until spoonable.

Ingredients

2 cups heavy cream (480 ml)
⅔ cup granulated sugar, divided (135 g; use 120 g in the cream and 15 g for topping)
2 tablespoons finely grated lemon zest (from about 2 lemons)
6 tablespoons fresh lemon juice (90 ml), strained
⅛ teaspoon fine salt (about 0.7 g)

Instructions

Prepare the serving dishes. Set six small, heatproof ramekins or shallow dessert dishes on a tray. Ramekins holding about ½ cup (120 ml) each give a good balance of creamy filling and brûléed top. Have a fine-mesh strainer ready. This dessert is served cold, so there is no oven step.
Simmer the cream mixture. In a medium, heavy-bottomed saucepan, combine the cream, ½ cup plus 1 tablespoon of the sugar (120 g), lemon zest, and salt. Warm over medium heat, stirring until the sugar dissolves. Bring the mixture to a gentle, steady simmer, stirring often and watching closely so it does not boil over. Simmer for 3 minutes; reduce the heat if it bubbles vigorously. A heavy pan helps prevent scorching.
Add the lemon juice. Take the pan off the heat and let it stand for 2 minutes. Slowly whisk in the strained lemon juice. The cream may look slightly thicker or lightly curdled at first; that is expected as the acid reacts with the cream. Pour the mixture through the strainer into a heatproof jug to remove zest and any small bits, then divide it evenly among the ramekins.
Chill until set. Let the dishes cool at room temperature for about 20 minutes, then cover loosely and refrigerate for at least 4 hours, or until the centers are softly set and no longer warm. Do not put hot ramekins directly into a crowded refrigerator. The possets can be chilled overnight; keep them covered to prevent them absorbing fridge odors.
Caramelize the tops just before serving. Blot any condensation from the surfaces with a corner of clean paper towel. Sprinkle each posset with a very thin, even layer of the reserved 1 tablespoon sugar (15 g total). Use a kitchen torch, moving it steadily over the sugar until it melts and turns amber. Keep the flame moving and avoid heating one spot for too long, which can warm and soften the posset underneath. Let the tops harden for 1–2 minutes, then serve. For the best contrast, brûlée only the portions you plan to eat right away.

Tips

Measure lemon juice accurately. Fresh lemon juice gives the cleanest flavor, but too much can make the posset sharply tart or affect its texture. Strain it and use 90 ml rather than estimating by eye.
Use heavy cream, not half-and-half. The high fat content is important for a rich, stable set. Whipping cream with a similar fat percentage is suitable; lighter cream or milk may not set reliably.
Simmer gently and watch the pan. A vigorous boil can cause the cream to foam over or scorch. Stir frequently, and lift the pan from the heat if the bubbles rise too quickly.
Keep the sugar topping thin. A thick layer can burn before it melts through. If you do not have a torch, see the broiler option below, but use heatproof dishes and watch constantly.

Serving Suggestions

Serve the possets straight from their ramekins, ideally after the sugar crust has had a minute or two to harden. A small spoon cracks the caramel before reaching the cool, creamy layer. Fresh berries, a few thin slices of strawberry, or a little extra lemon zest make simple accompaniments. Plain shortbread or crisp butter biscuits are also good alongside, especially if you want something to dip into the cream.

Because both the posset and its sugar crust are rich, keep garnishes modest. Add fruit just before serving rather than storing it on top; juicy fruit can soften the caramel and release liquid onto the surface.

Variations

Use lime or orange. Replace the lemon juice with the same amount of strained lime juice for a sharper version. Orange juice is less acidic and may not set the cream as firmly, so use lemon or lime if you want the most dependable texture; add orange zest for a gentler citrus note.
Add a berry layer. Spoon a small amount of thick, cooled berry compote into each dish before pouring in the posset. Keep it to a thin layer so the cream has room to set and the portions are not overly sweet.
Make it without a torch. Arrange the cold ramekins on a sturdy baking tray and place them under a fully preheated broiler, close to the element, for a short burst until the sugar melts and colors. Watch continuously—the change from caramelized to burnt can happen quickly. Use only dishes explicitly safe for broiler heat, and return the possets to the refrigerator briefly if their tops become warm.
Serve without brûlée. The lemon posset is delicious plain if you do not have a torch. Add a crisp biscuit on the side for crunch instead of trying to caramelize sugar in a pan and pouring hot caramel over the chilled cream.

Storage and Reheating

Cover the un-torched possets and refrigerate them within 2 hours of preparation; they keep well for up to 3 days. The sugar crust is best made just before serving because moisture from the refrigerator gradually makes it sticky and soft. Leftover brûléed portions can be refrigerated, but expect the topping to lose its crackle. This cream-based dessert is not suited to room-temperature storage or reheating, and freezing can make its texture grainy.

Frequently Asked Questions

Why has my lemon posset not set?
It may need more chilling time; allow at least 4 hours and check that the refrigerator is cold. A low-fat cream, inaccurate measurements, or too little simmering can also prevent a firm set. Keep the specified heavy cream and simmer it gently for the full 3 minutes before adding the measured lemon juice.

Can I make lemon posset brûlée the day before?
Yes. Make and chill the possets, covered, for up to 3 days, then add and caramelize the sugar shortly before serving. Preparing the crust early is not recommended because it absorbs moisture and stops being crisp.

Can I use bottled lemon juice?
Fresh juice is preferable for a bright flavor and consistent results. Bottled juice can vary in acidity and taste, so use 90 ml and strain it if needed; avoid juice with added sweeteners or flavorings.

What if I do not own a kitchen torch?
A broiler can melt the topping, but it is less controlled and may warm the posset. Use broiler-safe dishes, preheat the broiler, watch the ramekins continuously, and stop as soon as the sugar turns amber. You can also skip the brûlée and serve the posset with a crisp biscuit.

Can I make this recipe dairy-free?
Not reliably with a direct substitute. Coconut cream has a different flavor and fat composition, and many plant-based creams do not set like heavy dairy cream when combined with lemon. A dairy-free version needs a recipe developed and tested specifically for that type of cream.

Why is the cream mixture slightly curdled after adding lemon?
A little thickening or a lightly uneven appearance is normal as the acid works on the cream. Straining removes zest and small flecks, and chilling smooths the texture. If it separates heavily or smells scorched, the cream may have boiled too hard or caught on the bottom of the pan.

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Safety notes: safe minimum internal temperatures from USDA FSIS; raw and undercooked fish guidance from the U.S. FDA. Food safety notes

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