Posset is the kind of dessert that makes you feel like a magician. With just a handful of ingredients, a saucepan, and a squeeze of lime, you get a silky, spoonable cream that sets without eggs or gelatin. Here, coconut milk adds lush tropical flavor, and a quick mango-lime salsa brings juicy contrast.
Jump to RecipeIt’s sweet but not heavy, bright but comforting, and ready faster than most takeout. If you want a showstopper that’s low effort and high payoff, this is it.
Why This Recipe Works
- Acid sets the cream. Lime juice thickens the sweetened coconut-and-cream mixture, giving you a natural custard without eggs or starch.
- Coconut + dairy balance. Full-fat coconut milk brings body and aroma, while heavy cream gives that classic, ultra-smooth posset texture.
- Heat control matters. A gentle simmer dissolves the sugar and reduces the mixture slightly, concentrating flavor and helping it set cleanly.
- Fresh, contrasting topping. The mango salsa adds tang, sweetness, and a little crunch, cutting through the richness so each bite stays exciting.
- Fast chill option. Shallow dishes or small glasses let the posset set quickly, so dessert is on the table in about an hour.
Shopping List
- Heavy cream (1 cup)
- Full-fat coconut milk (1 cup; well shaken)
- Granulated sugar (1/3 to 1/2 cup, to taste)
- Limes (2–3 for juice and zest)
- Pure vanilla extract (1/2 teaspoon)
- Fine sea salt (a pinch)
- Ripe mango (1 large, diced small)
- Fresh mint (a few leaves, optional)
- Toasted coconut flakes (optional, for garnish)
Instructions
- Prep your tools. Set out 4–6 small glasses, ramekins, or shallow dishes. The shallower they are, the faster the posset sets.
- Combine base in a saucepan. Add heavy cream, coconut milk, sugar, lime zest (from 1 lime), and a pinch of salt to a medium saucepan.Stir to dissolve the sugar.
- Simmer gently, not wildly. Bring to a gentle simmer over medium heat, stirring occasionally. Let it bubble softly for 3–4 minutes. You want steam and tiny bubbles around the edges, not a rolling boil.
- Add the acid off heat. Remove from heat.Stir in 3–4 tablespoons fresh lime juice and the vanilla. Taste and adjust sweetness or acidity. It should taste slightly sweeter than you want the final dessert to be.
- Strain for silkiness (optional but great). Pour through a fine-mesh sieve into a pitcher or bowl to catch zest or any tiny coagulated bits.This gives an ultra-smooth finish.
- Pour and chill. Divide the mixture among your dishes. Cool on the counter 10 minutes, then transfer to the fridge. Small dishes can set in 45–60 minutes; deeper ones may need 2–3 hours.
- Make the mango salsa. In a bowl, combine diced mango with 1–2 teaspoons lime juice, a pinch of salt, and finely chopped mint (if using).Stir, taste, and adjust acidity.
- Serve with contrast. Once the posset jiggles slightly and feels set when tapped, spoon mango salsa on top. Finish with toasted coconut flakes for crunch if you like.
- Garnish and enjoy. Add extra lime zest or a mint sprig. Serve chilled, and store any leftovers covered in the fridge.
Coconut Lime Posset with Mango Salsa
Silky, spoonable coconut cream set with lime juice and topped with juicy mango salsa — a no-egg, no-gelatin dessert that feels like magic
Ingredients — Posset Base
- 1 cup heavy cream
- 1 cup full-fat coconut milk, well shaken
- ⅓–½ cup granulated sugar, to taste
- Zest of 1 lime
- 3–4 tbsp fresh lime juice (from 2–3 limes)
- ½ tsp pure vanilla extract
- Pinch of fine sea salt
Ingredients — Mango Lime Salsa
- 1 large ripe mango, diced small
- 1–2 tsp fresh lime juice
- Pinch of salt
- A few fresh mint leaves, finely chopped (optional)
To Garnish
- Toasted coconut flakes (optional, for crunch)
- Extra lime zest or a mint sprig
Instructions
- Prep the DishesSet out 4–6 small glasses, ramekins, or shallow dishes. The shallower and wider the dish, the faster the posset sets — aim for dishes about 1–1½ inches deep if you want a 45–60 minute set time.Chill your serving dishes in the fridge before pouring — cold dishes help the posset start setting faster from the bottom up.
- Simmer the BaseCombine the heavy cream, coconut milk, sugar, lime zest, and a pinch of salt in a medium saucepan. Stir to help the sugar dissolve. Bring to a gentle simmer over medium heat, stirring occasionally. Let it bubble softly for 3–4 minutes — small bubbles around the edges, not a rolling boil.Never let the mixture boil hard — vigorous boiling can split the cream and give the posset a greasy or grainy texture. Gentle is the key word throughout.
- Add Lime and VanillaRemove the pan from the heat. Stir in 3 tablespoons of fresh lime juice and the vanilla extract. Taste — it should be slightly sweeter than you want the final dessert, as cold temperatures mute sweetness. Add up to 1 more tablespoon of lime juice if you want more acidity.Add the lime juice off the heat, not into a boiling mixture. Too much heat after the acid goes in can cause curdling. Always start with 3 tablespoons and taste before adding more.
- Strain and PourFor the smoothest texture, pour the mixture through a fine-mesh sieve into a pitcher or spouted bowl to catch any zest or tiny coagulated bits. Divide evenly among the prepared dishes. Cool on the counter for 10 minutes, then transfer to the fridge.Straining is optional but takes 30 seconds and makes a noticeable difference in texture — the posset goes from very good to truly silky.
- Chill Until SetRefrigerate for 45–60 minutes for shallow dishes, or 2–3 hours for deeper ones, until the posset jiggles slightly when tapped but feels set and holds its shape at the edges.Don't rush the chill — an underchilled posset tastes thinner and won't hold its shape when topped with the salsa. When in doubt, give it another 15 minutes.
- Make the Mango SalsaIn a small bowl, combine the diced mango with lime juice, a pinch of salt, and finely chopped mint if using. Stir to combine and taste — it should be bright and a little tangy. Prepare this close to serving time for the freshest colour and texture.Use ripe Ataulfo (honey) mangoes if you can find them — they're sweet, barely fibrous, and dice beautifully. Avoid hard or stringy fruit.
- Top and ServeSpoon the mango salsa over each set posset just before serving. Scatter toasted coconut flakes over the top if using, add a little extra lime zest or a mint sprig, and serve chilled.Add the mango salsa at the last moment — spooning it on hours ahead causes the juices to weep onto the posset surface and the topping loses its brightness.
Tips for the Best Results
- Never let the base boil hard — a gentle simmer with small bubbles at the edges is all you need. Hard boiling splits the mixture and creates a greasy or grainy texture.
- Add lime juice off the heat and start with 3 tablespoons — too much acid or adding it while still boiling can cause curdling. Taste before adding the fourth tablespoon.
- The warm posset should taste slightly sweeter than you want the finished dessert — cold temperatures mute sweetness, so this balances out once chilled.
- Use full-fat coconut milk only — light or reduced-fat versions won't set properly and dilute the coconut flavour.
- Strain the mixture through a fine-mesh sieve before pouring — it takes 30 seconds and gives you a noticeably smoother, more elegant texture.
- Add the mango salsa just before serving — preparing it hours ahead causes the juices to weep and the colours to dull.
- Store posset covered in the fridge for up to 3 days. Keep the mango salsa separate and add fresh just before serving. Do not freeze — the texture turns grainy after thawing.
Keeping It Fresh
Posset keeps well in the refrigerator for up to 3 days.
Keep it tightly covered to prevent fridge odors from sneaking in. For the best texture, add the mango salsa just before serving so the juices don’t weep onto the posset. If you’re prepping ahead, store the salsa in a separate container and stir it once more before topping.
Avoid freezing; the texture turns grainy after thawing.
Health Benefits
- Vitamin C boost. Lime and mango bring antioxidants and immune-friendly vitamin C, brightening flavor without heavy add-ins.
- Energy-dense, portion-friendly. Cream and coconut milk are rich and satisfying, so small servings feel indulgent without needing a lot.
- Healthy fats from coconut. Coconut milk provides medium-chain fats, which some people find easier to digest in moderate amounts.
- Lower sugar option. You control the sugar. With ripe mango and lime, you can use the lower end of the sugar range and still get a dessert that tastes complete.
What Not to Do
- Don’t boil hard. Vigorous boiling can split the mixture or give it a greasy finish. Gentle simmering is key.
- Don’t skip the chill. Posset needs time to set.If you spoon it too warm, it won’t hold its shape and will taste thinner.
- Don’t over-acidify. Too much lime can curdle the texture and make it chalky. Start with 3 tablespoons, then taste before adding more.
- Don’t use low-fat coconut milk. Light versions won’t set as well and dilute flavor. Full-fat gives the right body.
- Don’t top too early. Adding mango salsa hours ahead can lead to watery tops and slippery layers.
Variations You Can Try
- Pineapple-ginger twist. Swap mango for pineapple and add 1 teaspoon grated fresh ginger to the salsa.Garnish with candied ginger.
- Passion fruit pop. Spoon fresh passion fruit pulp over the set posset for tang and crunch. Reduce lime juice slightly to balance acidity.
- Berry-lime buckle. Use macerated strawberries or blueberries with a touch of lime zest and a tiny pinch of black pepper for warmth.
- Dairy-free route. Use all full-fat coconut milk (2 cups) and skip the cream. Expect a slightly looser set; chill in small, shallow dishes.
- Toasted sesame finish. Add a drizzle of toasted sesame oil (just a few drops) to the mango salsa and sprinkle with black sesame seeds for a savory edge.
- Spiced coconut. Simmer the base with a strip of lime peel and 1–2 lightly crushed cardamom pods; strain before chilling.
FAQ
Can I make this ahead?
Yes.
Make the posset up to 2 days in advance and keep it covered in the fridge. Prepare the mango salsa the day you plan to serve, and add it just before bringing the desserts to the table.
What if I don’t have heavy cream?
You can use all full-fat coconut milk for a dairy-free version, but it sets a bit softer and tastes more coconut-forward. To help it set, simmer 1–2 extra minutes and chill in smaller, shallower containers.
How sweet should it be before chilling?
It should taste a touch sweeter than you want the final dessert.
Cold temperatures mute sweetness, so a slightly sweeter warm mixture balances out once chilled.
Can I use bottled lime juice?
Fresh is best for brightness and a clean set. Bottled juice can taste flat and sometimes harsh. If you must use it, reduce the amount slightly and add extra zest to bring back fragrance.
Why is my posset grainy?
It likely boiled too hard or had too much acid.
Next time, keep the heat gentle, add the lime off heat, and consider straining. Graininess can also come from low-fat coconut milk or insufficient sugar dissolution.
How do I speed up the set time?
Use wide, shallow dishes and chill them in the fridge before pouring. You can also place the filled dishes on a chilled sheet pan to help pull down the temperature quickly.
What’s the best mango to use?
Ripe Ataulfo (honey) mangoes are ideal—sweet, less fibrous, and easy to dice.
Any ripe, fragrant mango works; avoid hard or stringy fruit for the best texture.
Can I scale this recipe?
Absolutely. Double the mixture and use a larger saucepan to maintain a gentle simmer. Pour into more dishes rather than deeper ones so they still set in a reasonable time.
Is this gluten-free?
Yes, the base recipe is naturally gluten-free.
Just make sure any garnishes, like toasted coconut flakes, are from a gluten-free source if cross-contamination is a concern.
Jump to RecipeWhat can I use instead of mint?
Fresh basil adds a lovely herbal note, or skip herbs and add a tiny pinch of chili flakes to the salsa for a sweet-heat contrast.
In Conclusion
This 15-minute coconut lime posset proves that dessert doesn’t need to be complicated to be special. With a bright citrus backbone, creamy body, and a sunny mango topping, it brings restaurant polish to a weeknight table. Keep the technique gentle, the flavors fresh, and the portions small, and you’ll have a dessert that disappears fast—and earns repeat requests.
