Step 1: In a large bowl, cream together the softened butter and granulated sugar until smooth and pale.
Step 2: Stir in the lemon zest, crushed lavender buds, and vanilla extract until well combined.
Step 3: Gradually add the flour and salt to the butter mixture, mixing on low speed until a dough forms.
Step 4: Wrap the dough in plastic wrap and chill in the refrigerator for at least 1 hour.
Step 5: Preheat your oven to 325°F (165°C) and line a baking sheet with parchment paper.
Step 6: Roll out the dough on a floured surface to 1/4-inch thickness and cut into desired shapes.
Step 7: Place cookies on the baking sheet and bake for 12-15 minutes, or until the edges are very lightly golden.
Step 8: Allow cookies to cool on the baking sheet for 5 minutes before transferring to a wire rack to cool completely.