Lemon Posset
Lemon posset is the kind of dessert that makes people blink and say, “That’s it?” It’s unbelievably simple, just cream, sugar, and lemon; but the result is smooth, rich, and velvety with a fresh citrus snap. There’s no gelatin, no eggs, and no baking. The magic happens when lemon juice naturally sets sweet cream into a delicate custard.
It’s an old British classic that feels modern on any table, whether it’s a casual weeknight or a dinner party finale.
What Makes This Recipe So Good
- Only three ingredients. Heavy cream, sugar, and lemon—no thickeners, no fuss.
- Fast and foolproof. The cooking time is just a few minutes, and the rest is chill time in the fridge.
- Lusciously smooth texture. It sets into a silky, spoonable cream that feels luxurious.
- Bright, clean flavor. The lemon cuts through the richness, so each bite tastes balanced.
- Make-ahead friendly. Perfect for entertaining—you can prepare it the day before.
Ingredients
- Heavy cream (also labeled double cream in the UK) – 2 cups (480 ml)
- Granulated sugar – 1/2 cup (100 g)
- Fresh lemons – you’ll need 1/3 cup (80 ml) fresh lemon juice and the zest of 1 lemon
- Optional garnishes – fresh berries, extra lemon zest, shortbread cookies, or a sprig of mint
Instructions
- Prep the lemons. Wash and dry the lemons. Finely zest one lemon, avoiding the bitter white pith. Juice enough lemons to get 1/3 cup (80 ml) of juice.
Strain the juice to remove seeds and pulp.
- Warm the cream and sugar. In a medium saucepan, add 2 cups (480 ml) heavy cream and 1/2 cup (100 g) sugar. Set over medium heat. Stir gently as it warms to dissolve the sugar and prevent scorching.
- Bring to a gentle boil. Once the sugar is dissolved, bring the mixture to a steady boil and let it bubble for 2–3 minutes.
Keep it at a controlled simmer-boil, not a raging boil. This slightly reduces and thickens the cream.
- Remove from heat and add lemon. Take the pan off the heat. Stir in the lemon zest and 1/3 cup (80 ml) lemon juice.
Whisk for 30 seconds. You’ll notice the cream thickening as the acid reacts with the dairy.
- Rest briefly. Let the mixture sit for 5 minutes to allow any foam to settle. Skim off excess foam if you want an ultra-smooth finish.
- Pour into serving dishes. Divide the mixture among 4–6 small ramekins, glasses, or cups.
Tap each gently on the counter to release air bubbles.
- Chill to set. Cover and refrigerate for at least 3 hours, preferably 4–6. The posset will thicken into a soft, creamy set.
- Garnish and serve. Serve chilled. Top with a few fresh berries, a twist of lemon zest, or a small shortbread cookie on the side.
Storage Instructions
- Refrigerate covered for up to 3 days.
Keep the possets in their serving cups, covered with plastic wrap or lids.
- Do not freeze. Freezing can cause the cream to separate and turn grainy.
- Add garnishes just before serving so berries or zest stay fresh and vibrant.
Why This is Good for You
It’s dessert, so let’s be honest: this is about pleasure. Still, lemon posset has a few quiet perks. Lemons deliver vitamin C and bright, natural flavor, which lets you keep the ingredient list short and clean.
The recipe is also portion-friendly—small servings feel satisfying thanks to the rich texture.
Because it’s made with only a handful of ingredients, you know exactly what’s in your dessert. No stabilizers or odd thickeners, just simple kitchen staples. For many people, that kind of transparency is its own kind of good.
What Not to Do
- Don’t swap heavy cream for milk or half-and-half. It won’t set properly.
You need the fat content of heavy cream.
- Don’t skip the brief boil. That 2–3 minute simmer-boil helps the cream reduce slightly and improves the final set.
- Don’t use bottled lemon juice. Fresh juice delivers brighter flavor and better setting power.
- Don’t add lemon while the pan is still on high heat. Remove from heat first to avoid curdling or scorching.
- Don’t rush the chill time. If it hasn’t chilled for at least 3 hours, it may not set fully.
Variations You Can Try
- Lemon-vanilla posset. Add 1 teaspoon pure vanilla extract or scrape half a vanilla bean into the cream as it heats. Strain before chilling for a sleek finish.
- Lemon-thyme posset. Steep a small sprig of fresh thyme in the cream while it heats. Remove before adding lemon.
It adds a gentle herbal note that feels restaurant-fancy.
- Ginger-lemon posset. Add 4–5 thin slices of fresh ginger to the cream during heating, then strain. The warmth of ginger pairs beautifully with the citrus.
- Lime or grapefruit twist. Swap part of the lemon juice for lime or pink grapefruit. Keep total juice at 1/3 cup and taste for balance.
- Buttermilk accent. Stir in 2–3 tablespoons of cold buttermilk after the lemon, off the heat.
It adds a tangy edge and a lighter texture. Don’t overdo it or the set may soften.
- Crushed biscuit base. Sprinkle a thin layer of crushed shortbread or digestive biscuits at the bottom of each cup before pouring in the posset. It adds a gentle crunch.
FAQ
What exactly is a posset?
Historically, posset was a warm drink of milk curdled with wine or ale.
The modern version is a chilled dessert made by thickening sweetened cream with lemon juice. It sets into a smooth, custard-like cream without eggs or gelatin.
Why does lemon juice set the cream?
The acid in lemon juice causes the proteins in cream to coagulate slightly, thickening the mixture as it cools. The brief boil reduces the cream and helps the final texture hold.
Together, they create that soft, spoonable set.
Can I reduce the sugar?
Yes, but there’s a limit. Try 6 tablespoons (75 g) if you prefer it less sweet. Any lower and the balance of sweetness to acidity can feel harsh, and the texture may suffer.
Can I double the recipe?
Absolutely.
Use a larger pot so the cream doesn’t boil over. Keep the same timing: a gentle boil for 2–3 minutes. Pour into more serving cups and chill as usual.
How do I fix a posset that didn’t set?
If it’s still soft after 6 hours, it may need more chill time or had too little acid or fat.
You can repurpose it as a luscious lemon cream over berries, pound cake, or pavlova. For next time, use heavy cream and a full 1/3 cup of fresh lemon juice.
Do I need to strain the mixture?
It’s optional. Straining removes zest for an ultra-smooth texture.
If you enjoy a subtle citrus bite and aroma, leave the zest in. Either way works.
What should I serve with lemon posset?
Fresh berries, shortbread, almond cookies, or thin biscotti are all great. A few extra flecks of lemon zest or a microplane of dark chocolate can also be lovely.
Keep it simple and let the posset shine.
Is there a dairy-free version?
Classic posset depends on dairy fat and proteins to set, so it doesn’t translate cleanly to coconut milk or nut milks. For a dairy-free dessert with similar vibes, try a citrus panna cotta with a plant-based gelatin alternative.
Final Thoughts
Lemon posset is proof that the simplest recipes can feel the most special. With three basic ingredients and a few minutes at the stove, you get a creamy, bright dessert that tastes like sunshine.
Make it ahead, keep the portions small, and finish with a few berries or a crisp cookie. It’s the kind of recipe you memorize once and serve forever—quietly elegant, always welcome, and surprisingly easy.
Lemon Posset
Ingredients
- Heavy cream (also labeled double cream in the UK) – 2 cups (480 ml)
- Granulated sugar – 1/2 cup (100 g)
- Fresh lemons – you’ll need 1/3 cup (80 ml) fresh lemon juice and the zest of 1 lemon
- Optional garnishes – fresh berries, extra lemon zest, shortbread cookies, or a sprig of mint
Instructions
- Prep the lemons. Wash and dry the lemons. Finely zest one lemon, avoiding the bitter white pith. Juice enough lemons to get 1/3 cup (80 ml) of juice. Strain the juice to remove seeds and pulp.
- Warm the cream and sugar. In a medium saucepan, add 2 cups (480 ml) heavy cream and 1/2 cup (100 g) sugar. Set over medium heat. Stir gently as it warms to dissolve the sugar and prevent scorching.
- Bring to a gentle boil. Once the sugar is dissolved, bring the mixture to a steady boil and let it bubble for 2–3 minutes. Keep it at a controlled simmer-boil, not a raging boil. This slightly reduces and thickens the cream.
- Remove from heat and add lemon. Take the pan off the heat. Stir in the lemon zest and 1/3 cup (80 ml) lemon juice. Whisk for 30 seconds. You’ll notice the cream thickening as the acid reacts with the dairy.
- Rest briefly. Let the mixture sit for 5 minutes to allow any foam to settle. Skim off excess foam if you want an ultra-smooth finish.
- Pour into serving dishes. Divide the mixture among 4–6 small ramekins, glasses, or cups. Tap each gently on the counter to release air bubbles.
- Chill to set. Cover and refrigerate for at least 3 hours, preferably 4–6. The posset will thicken into a soft, creamy set.
- Garnish and serve. Serve chilled. Top with a few fresh berries, a twist of lemon zest, or a small shortbread cookie on the side.
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