Shortbread Thumbprint Lemon Curd Cookies are a perfect combination of buttery, melt-in-your-mouth shortbread and tangy lemon curd that brings a delightful burst of flavor to each bite.
Cream together the unsalted butter and powdered sugar until light and fluffy. Add the vanilla extract and lemon zest, mixing until combined.
Gradually sift in the all-purpose flour and salt. Mix until just combined. If using, add the egg yolk for extra richness.
Scoop out tablespoon-sized portions of dough and roll them into balls. Place them on the prepared baking sheet, spacing them about 2 inches apart.
Press your thumb or the back of a spoon into the center of each dough ball to create an indentation.
Bake for 12-15 minutes or until the edges are lightly golden.
Allow to cool on the baking sheet for 5 minutes, then transfer to a wire rack to cool completely.
Fill the thumbprints with lemon curd using a small spoon or piping bag.
Serve and enjoy!
Notes
Store filled cookies in an airtight container at room temperature for up to a week. You can also freeze the cookies before filling them with lemon curd.