
Take a few basic items and whip up this zingy lemon white chocolate posset for an upscale treat that looks fancy but takes hardly any work. The creamy, silk-like consistency mixed with bright citrus notes strikes just the right balance between tang and sweetness – your dinner guests won't believe how good it is.
I whipped this posset up for the first time at a springtime outdoor gathering and couldn't get over how such a simple dessert got so many wows. These days it's my go-to trick whenever I want to wow people with dessert but don't want to spend forever in the kitchen.
Ingredients
- Fresh lemons: They supply both the zesty peel and tangy juice that gives this treat its bright, zippy flavor
- Heavy cream: Forms the rich, smooth base that firms up perfectly without any added gelatin
- White chocolate: Brings gentle sweetness and helps the mixture set with the perfect consistency
- Vanilla extract: Adds warm, fragrant depth to the overall taste
- Granulated sugar: Works with the sour lemon for a perfectly balanced sweetness
Step-by-Step Instructions
- Heat the Base:
- Put the heavy cream, white chocolate, vanilla extract and sugar together in a medium pot over medium heat. Keep stirring often to stop it from burning and to get the chocolate to melt evenly into the cream. All that stirring makes sure you won't end up with any gritty sugar bits in your smooth mixture.
- Bring to a Gentle Boil:
- Keep heating until you see small bubbles forming steadily. Watch it carefully since cream can foam up and spill over fast. You want tiny bubbles breaking the surface, not a full rolling boil. Hold this gentle bubbling for exactly 5 minutes while you stir non-stop to get the right thickness.
- Add Citrus Elements:
- Take the pot off the heat and right away mix in the lemon juice and zest. The lemon's acid will work with the cream to thicken it more. Stir everything together completely so the flavor and texture turn out the same throughout.
- Rest and Pour:
- Let the mix cool down and start setting for about 10 minutes at room temp before you pour it into your serving dishes. This short cooling break helps keep everything from separating and ensures it stays creamy. If you're using hollowed lemon halves like in the picture, pour slowly to avoid making a mess.
- Refrigerate:
- Put your filled containers in the fridge without covering them for at least 3 hours. During this time, the posset will keep firming up until it reaches that perfect silky feel. Leaving them uncovered stops water droplets from forming on top.
- Final Garnish:
- Just as you're ready to serve, sprinkle some extra fresh lemon zest and grated white chocolate on top to make it look pretty and add more flavor layers. The fresh zest gives a burst of aroma that makes eating it even better.

The cool thing about this posset happens when the acid from the lemons meets the hot cream mix. This reaction is what makes the dessert set up without needing any extra thickeners. I love watching people try to figure out how such a basic recipe creates such a fancy texture.
Creating Lemon Shells
To serve your posset in lemon shells like in the picture, start by cutting your lemons in half through the middle. Take a small knife and cut around the inside, then grab a spoon to gently scoop everything out while keeping the shell intact. You can use the juice you get directly in your recipe so nothing goes to waste. Set the empty shells on small plates or in egg cups so they don't tip over before you fill them.
Flavor Variations
The classic lemon version tastes amazing, but you can play around with other citrus fruits too. Try using lime for something more tropical or blood orange for a gorgeous color that's not as sour. Another option is to steep herbs like lavender or thyme in the cream before adding the white chocolate – these aromas go really well with the lemon taste.
Troubleshooting Tips
If your posset doesn't firm up enough after chilling, you probably didn't boil the cream mixture long enough. You really need those full 5 minutes of gentle bubbling for it to set right. On the flip side, if it turns out too stiff, you might've boiled it too hard which made too much liquid evaporate. When it's just right, a posset should be like a soft pudding that stays on your spoon without running off.

Pair this posset with some shortbread cookies or thin crispy wafers to add some crunch. The buttery cookies make a perfect match for the smooth, creamy dessert. For fancy occasions, top it with a tiny edible flower like a viola or pansy to make it look extra special.
Frequently Asked Questions
- → What is a posset and how is it different from pudding?
A posset comes from British cooking where acid from lemons naturally thickens cream into a smooth custard-like dessert. It's not like pudding because you don't need eggs, cornstarch, or gelatin to make it thick - just the natural reaction between the lemon acid and cream does all the work.
- → Can I make this posset ahead of time?
You bet! This sweet is great for planning ahead. You can make these treats up to 3 days early - just keep them wrapped up in the fridge and add the final pretty touches right before you serve them.
- → What can I use if I don't have individual serving dishes?
While folks usually serve possets in small fancy cups or glasses, you can also put the mix in a small pretty bowl or even tea cups. Just pick something that shows off how nice it looks and makes it easy to dish out.
- → Can I substitute the white chocolate with another type?
This recipe really shines with the gentle mix of white chocolate and lemon, but you could try milk chocolate for something different. Still, white chocolate creates a really nice balance with the tangy lemon bits.
- → Why did my posset not set properly?
Most times when a posset stays runny, you didn't boil it long enough. The cream mix needs to come to a full, gentle boil and stay there for the whole 5 minutes while you keep stirring. Also, make sure you're using heavy cream not the lighter stuff since the fat is what helps it set up right.
- → Can I make this dessert dairy-free?
Real possets work because of how dairy fat reacts with acid to make that special texture. You can try versions with coconut cream, but they won't feel the same in your mouth as the classic one made with real heavy cream.