Easy 3-Ingredient Lemon Posset in a Lemon Shell

I’ve always been partial to lemon-flavored desserts, but lemon posset holds a special place in my heart. All you need are 3 ingredients, one pan, and 15 minutes of prep work, but the adorably self-contained results are stunning. Imagine the concentrated puckery flavor of lemon curd, but with a consistency that’s closer to slightly melted 3-ingredient lemon ice cream. Yum!

How to Make Lemon Posset in Lemon Shells

Watch the full video recipe to learn how to make the BEST Lemon Posset Dessert.

Prefer the written recipe? Scroll down to the recipe box👇

Ingredients & Substitutions

• Lemons – We’ll need plenty of fresh lemon juice and zest to make the citrusy flavor pop. And, while you’re welcome to use regular ramekins or cocktail coupes for easier plating, serving lemon possets in lemon shells makes for a particularly showstopping surprise that just so happens to cut down on dishes. 😉
• Granulated Sugar – White sugar has a neutral flavor, so the bright acidity of lemons and the natural sweetness of cream can shine. If needed, you can swap in an equal amount of pure cane sugar for a less refined option, or use an equal amount of caster/superfine sugar.
• Heavy Cream – Also known as “double cream” across the pond, with a minimum of 36% milkfat, this is the most decadent dairy you can get your hands on. In a pinch, you can use slightly lighter “whipping cream” (30-36% milkfat), but the resulting posset might not be quite as firm after setting if you do.
• Vanilla Bean Paste – Optional, but nice for softening the edges and adding a hint of warmth.

This is just a short review of the ingredients; for the complete recipe, including quantities, scroll down to the recipe card 👇

What is posset?

A posset is a classic British dessert that’s surprisingly simple, yet feels incredibly elegant. At its core, posset is made from just cream, sugar, and citrus juice (most commonly lemon). There are no eggs, no gelatin, and no baking involved. Instead, the magic happens when the acid from the citrus naturally thickens the cream, creating a silky, spoonable custard-like texture. The result is a dessert that’s rich and creamy like panna cotta or my easy 4-ingredient crème brûlée, but brighter and lighter.

Because it relies on such a short ingredient list, posset is all about technique and balance. When made correctly, it’s proof posset-ive (sorry, couldn’t help myself 😂) that a few simple ingredients can create something truly remarkable.

Historically, posset dates back to medieval England, where it began as a warm, spiced drink made with milk or cream, sugar, and wine or ale as a remedy for colds. Over time, the recipe evolved into the posset dessert we know today, especially popular in England for dinner parties and holidays because it looks fancy but takes minimal effort.

Optional Variations & Dietary Adaptations

• Vegan Posset – Swap in your favorite dairy-free cream (e.g. full-fat canned coconut cream or vegan whipping cream) for a vegan-friendly twist. Note that coconut cream will impart a faint tropical flavor, not a bad thing, but just be aware!
• Lemon-Lime Posset – Swap some of the lemon juice/zest for fresh lime juice and lime zest. It keeps the dessert bright and tangy, but adds a slightly more tropical, punchy citrus flavor.
• Ginger Lemon Posset – Add a small amount of fresh grated ginger (or a pinch of ground ginger) while heating the cream, then strain it out before chilling. It adds a gentle warmth that pairs beautifully with lemon, especially in winter.
• Berry Lemon Posset – Spoon a little raspberry coulis or strawberry chia seed jam into the bottom of each serving glass before pouring in the posset mixture. It creates a pretty layered look and adds a sweet fruity contrast to the tart lemon.

Expert Tips & Tricks 

• Use heavy cream (not half-and-half). Posset needs enough fat to set properly, so stick with heavy cream for that thick, silky texture.
• Zest the lemons before juicing. It’s much easier to zest a whole lemon than a squeezed one, and the zest adds a bold lemony aroma without extra acidity.
• Don’t let the cream boil aggressively. Bring it to a gentle simmer, not a rolling boil. Too much heat can cause scorching and change the final texture.
• Simmer long enough to dissolve the sugar. Make sure the sugar is fully dissolved before adding the lemon so the posset turns out smooth (not grainy).
• Add the lemon juice off the heat. Once you remove the pot from the heat, stir in the lemon juice. This helps prevent curdling and keeps the texture creamy.
• Strain for the smoothest finish. If you want a super silky posset, pour the mixture through a fine mesh strainer before dividing into cups, especially if you added zest or any infused flavors.
• Chill until fully set. Posset needs time in the fridge to thicken properly. Give it at least 4 hours, but overnight is even better for the best texture.
• Serve it cold. Lemon posset is meant to be served chilled, cold brings out the tangy citrus flavor and makes the texture feel extra rich and creamy.

How to Store Lemon Posset

• Store lemon posset covered in the refrigerator for up to 3 days. It actually holds up really well, making it a great make-ahead dessert for dinner parties or holidays.
• For the best texture, cover each serving cup with plastic wrap or transfer leftovers to an airtight container so the posset doesn’t absorb any fridge odors.
• Freezing isn’t recommended, since the creamy texture can become grainy or separate once thawed.

More Lemon Dessert Recipes

• Lemon Tart
• Lemon Loaf with Lemon Glaze
• Lemon Meringue Pie
• Lemon Curd Thumbprint Cookies
• Lemon Bars
• Creamy Lemon Cheesecake Recipe

FAQs