Lemon Posset (Elegant 4-Ingredient Dessert)

Silky, bright, and impossibly simple, lemon posset is the British no-egg “custard” you can master in minutes. Heavy cream meets sugar and fresh lemon juice for a naturally thick, citrus-kissed dessert that chills to a spoonable dream. It’s make-ahead friendly and stunning in small glasses for spring dinners, Easter, or Mother’s Day.

Why This Matters

• Minimal ingredients, maximum payoff: just cream, sugar, lemon, and vanilla.
• No eggs, no cornstarch, no gelatin—acid sets the cream for you.
• Make-ahead perfection for stress-free entertaining.
• Restaurant-worthy texture with home-kitchen effort.
• Consistent results when you follow time, temperature, and ratios.

Ingredients

Yield: 6 petite servings (about 1/2 cup each)
Prep: 10 minutes | Cook: 8–10 minutes | Chill: 4 hours | Total: ~4 hours 20 minutes

• 2 cups heavy cream (480 ml), 36–40% milk fat
• 2/3 cup granulated sugar (130–135 g)
• 5 tablespoons fresh lemon juice (75 ml), strained
• 1 teaspoon pure vanilla extract
• Pinch fine sea salt
• Optional: 1 teaspoon finely grated lemon zest (for extra aroma)
• To serve: fresh berries, crisp shortbread, extra zest, or a mint sprig

Step-by-Step Instructions

1. Add cream, sugar, salt, and optional zest to a medium heavy-bottomed saucepan.
2. Heat over medium, stirring until sugar dissolves. Bring to a gentle simmer, then maintain a soft bubble for 3–4 minutes to slightly reduce. Do not hard-boil.
3. Remove from heat. Stir in lemon juice and vanilla until smooth. Let stand 10 minutes to begin setting.
4. Strain through a fine-mesh sieve into a spouted jug to remove zest and any bubbles.
5. Divide among 6 small glasses or ramekins. Cool to room temperature, then cover and chill at least 4 hours, preferably overnight.
6. Garnish with berries, zest, or shortbread. Serve well-chilled.

Pro Tips for Silky Posset

• Use fresh lemon juice; bottled can taste flat and may not set as reliably.
• Keep the simmer gentle to avoid splitting; aim for small, steady bubbles.
• Strain for the smoothest texture and a glossy finish.
• Chill completely. The set happens in the fridge; don’t rush it.
• Serve small portions—this dessert is rich by design.

Common Mistakes to Avoid

• Using light cream or half-and-half: too little fat to set properly.
• Boiling vigorously: can cause separation and a grainy texture.
• Adding lemon on the heat: curdles unevenly; always remove from heat first.
• Skimping on acid: too little lemon and it won’t thicken.
• Skipping the chill: warm posset tastes loose; chill 4+ hours.

Recommended Tools

• Medium heavy-bottomed saucepan
• Fine-mesh sieve and small ladle
• Microplane or zester (if using zest)
• Heatproof spatula and whisk
• Spouted measuring jug for clean pouring
• 6 small glasses or 4–6 ramekins

Variations

• Meyer Lemon Posset: Swap in Meyer lemons for a floral, less-tart finish; keep the same volume of juice.
• Lime or Orange: Use equal volume of lime or orange juice; add 1–2 teaspoons extra juice if sweetness is higher to maintain set.
• Honey-Sweetened: Replace half the sugar with runny honey for depth; warm gently to dissolve fully.
• Vanilla Bean: Infuse split vanilla bean while heating; remove before adding lemon.
• Lavender Citrus: Add a pinch (1/2 tsp) culinary lavender to the cream, steep 10 minutes off heat, strain, then add lemon.

FAQ

What is lemon posset?

Lemon posset is a classic British dessert made by gently simmering heavy cream with sugar, then adding lemon juice to naturally thicken it. No eggs or starch are required. After chilling, it sets into a luxuriously smooth, spoonable cream with bright citrus flavor—perfect in small glasses with berries or shortbread.

How long does lemon posset take to set?

Plan on at least 4 hours of refrigeration, though overnight yields the best texture. The initial thickening begins as the hot cream meets lemon juice, but the full set happens in the fridge as the mixture cools and the fat network stabilizes. Serve well-chilled for clean scoops and perfect spoons.

Why didn’t my posset set?

Common issues include using light cream, not simmering long enough to reduce slightly, or adding too little lemon juice. Vigorous boiling can also split the mixture. Use heavy cream (36–40% fat), simmer gently 3–4 minutes, measure lemon juice accurately, remove from heat before adding, and chill at least 4 hours.

Can I make lemon posset ahead and how long does it keep?

Yes. Lemon posset is ideal for entertaining because it’s fully make-ahead. Chill it covered for at least 4 hours and up to 3 days. Add garnishes just before serving to keep berries vibrant and cookies crisp. Avoid freezing; the texture can become grainy once thawed.

Can I reduce the sugar or use honey instead?

You can reduce sugar by about 15% without affecting set, but going lower risks a thinner texture. For honey, replace up to half the sugar with mild, runny honey. Fully dissolve it in the warm cream and taste; honey alters sweetness perception and may need an extra teaspoon of lemon juice.

What cream should I use?

Choose heavy cream or double cream with 36–40% fat. The fat content is essential for the acid-induced set and silky mouthfeel. Avoid light cream, half-and-half, or milk, which won’t thicken reliably. Ultra-pasteurized cream works, but standard pasteurized often gives a slightly richer texture and cleaner finish.

How do I prevent curdling or graininess?

Keep the heat moderate, aim for a gentle simmer, and avoid boiling vigorously. Always add lemon juice off the heat and whisk to combine smoothly. Strain through a fine-mesh sieve to remove any zest or specks. Chill undisturbed, and don’t stir once poured into serving glasses.

Conclusion

With four pantry ingredients and a few minutes at the stove, lemon posset delivers a polished, make-ahead dessert worthy of any celebration. Nail the gentle simmer, measure the lemon precisely, and allow a full chill. Then garnish simply and enjoy the creamiest citrus finish to your meal.