01 - Preheat the oven to 350°F. Line two baking sheets with parchment paper.
02 - In a medium bowl, whisk together flour, baking powder, and salt until well blended.
03 - In a small bowl, combine the lemon zest and dried lavender. Gently rub together with your fingers to release the essential oils and fragrances.
04 - In a large bowl, beat together the softened butter and sugar using an electric mixer until light and fluffy, approximately 2–3 minutes.
05 - Add the egg, vanilla extract, and lemon juice to the butter mixture. Beat until fully incorporated and smooth.
06 - Stir in the lemon zest and lavender mixture until evenly distributed throughout the batter.
07 - Gradually add the dry ingredients to the wet ingredients, mixing until just combined. Be careful not to overmix to maintain tender texture.
08 - Scoop tablespoon-sized balls of dough onto prepared baking sheets, spacing 2 inches apart to allow for spreading.
09 - Bake for 10–12 minutes, or until the edges are lightly golden and centers are set.
10 - Let cookies rest on the baking sheet for 5 minutes, then transfer to a wire rack to cool completely before serving.