01 -
Preheat oven to 180°C. Line two baking sheets with parchment paper.
02 -
In a small bowl, whisk together the flour, cornstarch, and baking powder. Set aside.
03 -
Beat the butter, granulated sugar, lemon zest, and lavender in a large bowl with a stand mixer fitted with paddle attachment (medium speed) until light and fluffy, 2 to 3 minutes. Scrape down the bowl as needed.
04 -
Mix in the egg until the mixture is well combined and smooth.
05 -
With mixer on low, add the flour mixture gradually and blend just until combined. Dough will appear slightly dry.
06 -
Using a small cookie scoop, portion dough into 1-tablespoon balls and arrange on prepared baking sheets spaced 5 cm apart.
07 -
Gently flatten each dough ball with your palm to approximately 1 cm thickness.
08 -
Bake one tray at a time for 12 to 15 minutes, or until centers are just set and edges appear lightly golden.
09 -
Let cookies cool on baking sheet for 5 minutes. Transfer to a wire rack to cool completely.
10 -
Whisk together the sifted powdered sugar, lemon juice, and lavender extract (if using) in a medium bowl. Add food coloring to tint the glaze to desired shade. Glaze should be thick but pourable.
11 -
Spoon glaze over cooled cookies. Optionally, sprinkle with lavender buds and lemon zest. Allow glaze to set for 30 minutes before serving.
12 -
Store cookies in an airtight container for up to 4 days, separating layers with wax paper.