Buttery lemon shortbread cookies with a delicate crumb and a bright citrus glaze. Simple to make, easy to roll and cut, and just right for everyday baking.
Whisk together the flour, cornstarch, and salt. Set aside.
Using an electric mixer on medium speed, beat the butter, sugar, and zest until light and creamy, about 2 minutes. Mix in the lemon juice and vanilla.
Add the flour mixture to the butter mixture and mix on low just until combined. The dough should be soft but not sticky; if needed, chill 10–15 minutes to make it easier to handle.
Roll out the dough between sheets of parchment paper to about ¼ inch thick. Chill until firm, about 30 minutes.
Cut into 2-inch rounds. Gather and re-roll as needed. Arrange on parchment-lined baking sheets and chill again for 15–20 minutes.
Preheat the oven to 325°F (165°C).
Bake one pan at a time for 14–16 minutes, or until set and just barely golden at the edges.
Cool on the pan 5 minutes, then transfer to a wire rack to cool completely.
To make the glaze:
Whisk the glaze ingredients until smooth and thick but pourable.
Spoon or drizzle over cooled cookies, sprinkle with more zest, and let set.
Notes
Chilling matters: Chilling the dough before and after cutting helps the cookies hold their shape and bake evenly.
Rolling thickness: Rolling the dough to about ¼ inch thick gives the best balance of crisp edges and tender centers.
Glaze consistency: The glaze should be thick but pourable. Add lemon juice a little at a time to get a glaze that’s visible and sets nicely.
Alternative finish: Instead of glazing, the cookies can be dusted with confectioners’ sugar or left plain once cooled.
Yield will vary slightly depending on cutter size.
Storage: Store the cookies in an airtight container at room temperature for up to 4 days. Unglazed cookies can be frozen for up to 2 months; thaw and glaze before serving.