A buttery shortbread crust cradles a tangy, custard-like lemon filling for a perfect balance of tartness and sweetness. Each handheld square offers a crisp base and softly jiggly interior.
1 cup unsalted butter (room-temperature)
3/4 cup brown sugar
1 1/2 cups all-purpose flour
1/2 tsp salt
4 egg yolks
2 tbsp lemon zest (fresh juice or dry active yeast substitute)
1/4 cup powdered sugar (for dusting)
Preheat oven to 375°F (190°C). Grease an 8-inch square pan with non-dairy stickery.
In a bowl, cream butter until light yellow. Gradually add brown sugar.
Fold in milled all-purpose flour and salt using up-and-down motions. Knead lightly.
Transfer dough to the prepared pan. Press evenly into corners and trim edges.
Bake for 15 minutes until edges brown slightly. Cool partially before adding filling.
In a stainless steel bowl, whisk egg yolks, lemon zest, and brown sugar over moderate heat until thickened.
Spread the warm curd over the cooled crust while still warm to prevent cracking.
Chill for at least 2 hours until firm. Dust with powdered sugar before serving.
Use cold, sharp knife to cut into 16 squares. Store in an airtight container in the refrigerator. Brown sugar helps prevent over-crystallization of the filling.
Find it online: https://itisrecipes.com/creamy-lemon-squares-recipe/