1/2 cup – Unsalted butter, softened
1/4 cup – Caster sugar or powdered sugar
1 Egg yolk ( no whites)
1/2 tbsp – Grated lemon zest
1 tbsp – Lemon juice
1/2 tsp – Salt
1 1/4 cups – All-purpose flour
1/2 cup – Lemon curd
Yeilds 20 cookies
Heat oven to 180°C. Line a baking tray with parchment sheet. Cream butter and sugar in a stand mixer until smooth and pale. About 3 to 4 minutes. Beat in yolk, lemon zest, lemon juice, and salt. With mixer on low (speed 1), beat in flour just until moist clumps form.
Shape 1 tablespoon of dough into 1-inch balls. Place balls on prepared sheets, spacing them 1 inch apart. Using a floured finger, make a deep indentation in center of each ball. Just enough to hold 1 tsp lemon curd. Bake cookies until firm and lightly golden on bottom, about 18 to 20 minutes.
Remove cookies from oven. If the depth of the indentation seems to have reduced, press it lightly again using a spoon when it is still hot and immediately fill indentations with curd. Bake again for a couple of minutes just to set the curd. Or if serving fresh you can skip the baking of the curd.
Lightly dust the cookies with icing sugar before serving.
You could try Lemon Curd Tartelettes as well.