Whisk Eggs and Sugar: In a medium heatproof bowl, whisk together two of the eggs, and the yolks from the other 2 eggs yolks, and granulated sugar until smooth
4 Eggs, ¾ Cup Granulated Sugar
Add Lemon & Cream: Stir in the lemon zest, lemon juice, and heavy cream.
½ Cup Freshly Squeezed Lemon Juice, 2 Tbsp Heavy Cream, 2 Tbsp Lemon Zest
Cook the Mixture: Place the bowl over a saucepan of simmering water (double-boiler method). Cook, whisking constantly, until the mixture thickens and reaches a custard-like consistency (about 10-20 minutes). Tip: If you are unsure that the consistency of the curd is “thick enough,” you can use a candy thermometer to make sure you’re good to go. It should read 170℉
Add Butter: Remove from heat and whisk in the butter pieces until fully melted and smooth.
1 Stick Unsalted Butter
Strain (Optional): For an extra smooth texture, strain the mixture through a fine-mesh sieve into a clean bowl.