Prepare the Dough:
- Cream the softened butter and powdered sugar in a large bowl until pale and fluffy.
- Mix in the lemon zest and vanilla extract.
- In a separate bowl, whisk together flour, chopped lavender, and salt.
- Gradually add the dry ingredients to the butter mixture until a soft dough forms.
Chill the Dough:
- Divide the dough into two logs about 1.5 inches in diameter.
- Wrap each log in plastic wrap and refrigerate for at least 2 hours.
Preheat the Oven:
- Preheat the oven to 350°F (175°C) and line a baking sheet with parchment paper.
Slice and Bake:
- Slice the chilled dough into 1/4-inch rounds.
- Place slices on the baking sheet, spacing them 1 inch apart.
- Bake for 10-12 minutes, or until edges are golden.
Cool and Serve:
- Cool on the baking sheet for a few minutes, then transfer to a wire rack to cool completely. Optionally, dust with powdered sugar or drizzle with lemon glaze.