Lemon Posset
It’s almost impossible to believe that lemon posset, a silky soft dessert, shares a name with a medieval cure-all of hot curdled milk and ale. Prescribed as a cold remedy throughout the 14th and 15th centuries, the original posset was more medicine cabinet than dessert bowl. Thank the ingenuity of 19th-century British chefs for rescuing it, transforming a murky hot draught into one of the most quietly elegant desserts in the repertoire.
What makes posset genuinely magical is the science hiding beneath its silky surface. No eggs. No gelatin. No fuss. The acid in fresh lemon juice does all the work. When stirred into hot, sweetened cream, it triggers a natural setting reaction that firms the mixture into something extraordinary as it chills: smooth and spoonable, with a texture that hovers between a feather-light mousse and a velvet panna cotta. It’s the kind of dessert that feels like a secret.
Lemons, limes, and key limes are all sufficiently acidic to work their magic here. So lean into whatever your citrus bowl has to offer. For more lemon recipes, click here.
You Will Need
- 2 cups heavy cream
- ⅔ cup white sugar
- ⅓ cup fresh lemon juice (2 – 3 lemons)
- ¼ teaspoon vanilla extract
Method
Combine the cream and sugar in a medium saucepan over medium-high heat, stirring until the sugar dissolves completely. Bring to a boil, then reduce the heat to maintain a steady, active boil for 5 minutes; don’t walk away from the pot. Remove from the heat and stir in the lemon juice and vanilla. Let the mixture rest and cool for 15 minutes.
Give it a gentle stir, then pour evenly into 6 to 8 small ramekins. For a more whimsical presentation, hollowed-out lemon halves make stunning vessels. Refrigerate for at least 2 hours, until the mixture is set and chilled through. Finish with a scatter of fresh berries, or take things up a notch and brûlée the surface for a caramelised, glass-like crust.
The Culinary Chase’s Note
If using lemon halves: Halve your lemons and use a spoon to scoop out the flesh cleanly. Squeeze the flesh through a sieve into a bowl. That’s your ⅓ cup of juice, straight from the source, nothing wasted. Enjoy!