Ingredients
4 large egg yolks, plus 1 large egg
1/2 cup sugar
1/3 cup fresh lemon juice (from 4 lemons)
Salt
1 tablespoon unsalted butter
1/2 cup cold heavy cream
Preparation
Whisk egg yolks, egg, sugar, lemon juice, and a pinch of salt in a large heatproof bowl set over a pan of simmering water. Cook, whisking constantly, until pale and thick, 4 to 5 minutes. Strain mixture through a fine sieve into a bowl. Whisk in butter. Cover with plastic wrap, pressing directly onto surface to prevent a skin from forming. Refrigerate for at least 1 hour.
Whisk heavy cream with a mixer on medium-high speed until stiff peaks form. Fold whipped cream into lemon curd. Use immediately.
