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+ servings
Key Lime Posset
Prep Time
10 mins
Cook Time
5 mins
Chill Time:
3 hrs
Total Time
3 hrs 15 mins

These key lime possets couldn't be easier to make, yet look and sound elegantly complicated. Super creamy with a refreshing lime twist. A British classic and a crowd pleaser.

Course: Dessert
Cuisine: British
Keyword: key lime posset
Servings: 6 servings
Calories: 477 kcal
  • 600 ml double (heavy) cream (2 3/4 cup + 2 tbsp )
  • 200 g caster (fine) sugar (1 cup)
  • 75 ml key lime juice (1/4 cup + 1 tbsp)
  • zest of 3 key limes (optional)
  1. Pour the sugar and cream into a large saucepan and gently heat, stirring continuously, until the sugar has fully dissolved, then simmer for 1 minute.
  2. Remove from the heat then immediately stir in the key lime juice and the zest, if using.
  3. Divide the mixture between ramekins or small bowls, and allow to come to room temperature before covering with plastic wrap and transferring to the fridge.
  4. Allow to chill for at least 3 hours, or up to 24 hours.
  5. Serve on it's own, or with complimentary fruits such as blueberries or raspberries.
Recipe Notes

If you cannot find key limes, regular limes will be fine.

©Baking a Moment

Nutrition Facts
Key Lime Posset
Amount Per Serving
Calories 477 Calories from Fat 333
% Daily Value*
Fat 37g57%
Saturated Fat 23g144%
Cholesterol 137mg46%
Sodium 39mg2%
Potassium 90mg3%
Carbohydrates 37g12%
Fiber 1g4%
Sugar 34g38%
Protein 2g4%
Vitamin A 1470IU29%
Vitamin C 4mg5%
Calcium 67mg7%
* Percent Daily Values are based on a 2000 calorie diet.