Preheat your oven to 350°F (175°C).
In a large mixing bowl, cream together the softened butter, granulated sugar, and brown sugar until light and fluffy.
Add the vanilla extract and egg, mixing until well combined.
In a separate bowl, whisk together the flour, baking soda, and salt.
Gradually add the dry ingredients to the wet mixture, stirring until just combined.
Fold in the chocolate chips and dried lavender.
Scoop tablespoon-sized portions of dough onto ungreased baking sheets, spacing them about 2 inches apart.
Bake for 10-12 minutes, or until the edges are golden brown.
Allow the cookies to cool on the baking sheets for 5 minutes before transferring them to wire racks to cool completely.