Ingredients for - Lemon Custard Filling

1. White sugar ½ cup
2. Cornstarch ¼ cup
3. Salt ¼ teaspoon
4. Water ¾ cup
5. Egg yolks 2 large
6. Lemon juice ⅓ cup
7. Unsalted butter 2 tablespoons

How to cook deliciously - Lemon Custard Filling

1 . Stage

Combine sugar, cornstarch, and salt in the top of a double boiler over simmering water. Stir frequently, scraping down the sides with a rubber spatula to avoid scorching, until sugar is melted, 3 to 5 minutes.

2 . Stage

Whisk water and egg yolks together in a small bowl; pour into sugar the mixture, whisking until fully incorporated. Cook, stirring constantly, until the mixture thickens, 3 to 5 minutes.

3 . Stage

Remove from the heat and stir in lemon juice and butter until incorporated. Cover with plastic wrap and let sit until completely cooled.