You’d never guess a dessert this silky, this creamy, this insanely good only has three ingredients.
No eggs. No gelatin. No fancy equipment. Just heavy cream, sugar, and lemon juice doing something almost unbelievable together in a pot.
Lemon posset has been around since medieval England, and once you make it, you’ll understand why it never went away. It sets itself. No baking, no water baths, no stress. You pour it into glasses, refrigerate it, and a few hours later you have something that tastes like it came from a high-end restaurant.
Grab a glass. This one’s worth making this week.
What You’ll Need
For the posset:
- 2 cups (480ml) heavy whipping cream
- ⅔ cup (135g) granulated white sugar
- 6 tablespoons (90ml) fresh lemon juice (about 3 large lemons)
- 1 tablespoon lemon zest (from the same lemons, zest before juicing)
For serving (optional but recommended):
- Fresh raspberries or strawberries
- Extra lemon zest
- A few sprigs of fresh mint
- Shortbread cookies on the side
Makes: 4 servings
Tools You’ll Need
- Medium saucepan
- Wooden spoon or heat-safe silicone spatula
- Microplane or fine zester
- Citrus juicer or reamer
- Fine mesh strainer
- Liquid measuring cup or pitcher (for easy pouring)
- 4 small glasses, ramekins, or dessert cups
- Plastic wrap or lids to cover while chilling
Pro Tips
1. Don’t skip the zest. The zest is where most of the real lemon flavor lives. The juice gives you acidity, but the zest gives you that bright, fragrant punch. Use a fine microplane and zest directly into the cream while it heats.
2. Measure your lemon juice precisely. This is the one place to be exact. Too little juice and the posset won’t set properly. Too much and it can turn grainy. Six tablespoons is the sweet spot for this quantity of cream.
3. Let it cool before pouring. After you stir in the lemon juice, let the mixture cool for 5 to 10 minutes before pouring into your glasses. This prevents condensation from forming inside the glasses and keeps the surface smooth.
4. Use full-fat heavy cream. This recipe only works with heavy whipping cream (at least 36% fat). Half-and-half or light cream won’t set. The fat is what reacts with the lemon acid to create that silky, almost jello-like texture.
5. Give it a full 4 hours in the fridge. It might look ready after 2 hours, but giving it the full time makes a big difference in the final texture. Overnight is even better if you’re making this ahead.
Make Ahead Tips
Lemon posset is one of those rare desserts that’s actually better made the day before.
Make it the night before your dinner party, cover the glasses with plastic wrap, and refrigerate. They’ll be perfectly set and ready to serve with zero day-of effort.
They keep beautifully in the fridge for up to 3 days, so you can make a batch at the start of the week and enjoy them whenever.
Substitutions and Variations
Swap the lemon for lime or grapefruit. Same technique, totally different dessert. Lime posset is incredibly refreshing in summer. Pink grapefruit posset is a little more bitter but pairs perfectly with honey on top.
Add a layer. Pour a thin layer of lemon curd on top once the posset has set for an extra punch of lemon flavor. Or a small spoonful of jam for something fruity.
Make it dairy-free. Full-fat coconut cream works as a substitute. The flavor is different (more tropical, less neutral) but it sets and tastes great.
Infuse the cream. Add a sprig of fresh thyme, rosemary, or lavender to the cream as it heats. Remove before adding the lemon juice. It adds a subtle herbal note that feels very fancy for very little effort.
Add a crust layer. Crush some shortbread cookies or digestive biscuits into the bottom of each glass before pouring the posset in. It gives you a creamy, dreamy parfait situation.
How to Make Lemon Posset
Step 1: Zest and juice your lemons.
Before anything else, zest your lemons. It’s much easier to zest a whole lemon than one that’s been juiced. Zest all three lemons (you want about 1 tablespoon of zest), then juice them and measure out exactly 6 tablespoons of juice. Set both aside.
Step 2: Heat the cream and sugar.
Add the heavy cream and sugar to a medium saucepan over medium heat. Stir constantly until the sugar dissolves. Then bring the mixture to a gentle boil and let it boil for exactly 3 minutes, stirring frequently. Keep an eye on it — cream can boil over fast.
Step 3: Remove from heat and add lemon.
Take the pan off the heat completely. Add the lemon zest, then pour in the lemon juice and stir well for about 30 seconds. You’ll notice the mixture thickens slightly. That’s exactly what you want. The acid is reacting with the fat in the cream to create the set.
Step 4: Cool slightly, then strain and pour.
Let the mixture sit for 5 to 10 minutes. Then pour it through a fine mesh strainer into a liquid measuring cup or pitcher (the strainer removes the zest and keeps the texture perfectly smooth). Pour evenly into 4 glasses.
Step 5: Chill.
Cover each glass with plastic wrap, making sure the wrap doesn’t touch the surface of the posset. Refrigerate for at least 4 hours, or overnight.
Step 6: Serve.
Top with fresh berries, a pinch of lemon zest, and a mint sprig if you have one. Serve with shortbread on the side. Enjoy every single spoonful.
Nutritional Breakdown (Per Serving)
| Nutrient | Amount |
|---|---|
| Calories | ~420 kcal |
| Total Fat | 36g |
| Saturated Fat | 22g |
| Carbohydrates | 22g |
| Sugar | 20g |
| Protein | 2g |
| Vitamin C | ~10% DV |
Note: These are estimates and will vary based on exact ingredients used.
Meal Pairing Suggestions
Lemon posset works beautifully as a light finish after a rich main course.
- Roast chicken or grilled fish
- A simple pasta dinner
- A summer BBQ spread
- High tea with sandwiches and scones
- A dinner party with multiple courses (it cleanses the palate perfectly)
The brightness of the lemon cuts through heavy meals and leaves you feeling refreshed instead of overly full.
Leftovers and Storage
In the fridge: Covered tightly, lemon posset keeps for up to 3 days. The texture stays perfect.
Can you freeze it? Technically yes, but the texture changes significantly once thawed. It’s best enjoyed fresh from the fridge.
Toppings: Add your toppings right before serving, not before storing. Berries will release juice and make things soggy overnight.
FAQ
Why didn’t my lemon posset set?
Two common reasons: not enough lemon juice, or the cream didn’t reach a full boil for the full 3 minutes. Both matter. The acid and the heat each play a role in getting the texture right.
Can I use bottled lemon juice?
Fresh is strongly recommended here. Bottled lemon juice has a duller, less bright flavor and sometimes contains preservatives that can interfere with the setting process. Fresh lemons are worth it for a recipe this simple.
My posset looks grainy. What went wrong?
This usually happens when too much lemon juice is added, or the acid is stirred in while the cream is still too hot. Let the cream cool for a few minutes off the heat before adding the juice.
Can I double the recipe?
Yes, easily. Use a larger saucepan and keep the same boil time. The ratios scale perfectly.
Do I need to use a strainer?
You don’t have to, but it’s worth it. Straining removes the zest (which can have a slightly bitter bite when left in) and gives you that ultra-smooth, glossy finish.
Can I make this in individual shot glasses for a party?
100% yes. Mini glasses make a stunning dessert table display and people love a two-bite dessert. Just note that smaller portions may set a little faster.
Is lemon posset the same as panna cotta?
They look similar but they’re made completely differently. Panna cotta uses gelatin to set. Lemon posset sets using the chemical reaction between lemon acid and cream fat. No gelatin needed, which makes this one even easier.
Wrapping Up
Three ingredients. One pot. Zero stress.
That’s what I love about lemon posset — it sounds like something complicated, but it’s actually one of the most forgiving, foolproof desserts you’ll ever make. And when you bring those little glasses to the table topped with fresh berries, people will absolutely think you spent way more time than you did. 😄
Give it a try this week — I think you’ll be genuinely surprised by how good something this simple can taste.
And when you do make it, drop a comment below and tell me how it went! Did you try any variations? Add a crust layer? Use lime instead? I’d love to hear about it.