In a large mixing bowl, cream together the butter and sugar until smooth. Beat in the eggs and vanilla extract. Add the lavender essential oil, if using.

In a separate bowl, stir together the flour, lavender flowers, baking powder, and salt until well combined.

Add the wet ingredients to the dry ones and gently fold in until mixed. Cover, and chill the dough for at least one hour or overnight.

Once the dough has chilled, preheat the oven to 400°F. Roll out the cookie dough on a floured surface into a rectangle ¼- ½-inch thick. If the dough sticks, spray it lightly with coconut oil cooking spray. Cut your cookies into shapes using your favorite cookie cutter. You may need to spray your cookie cutters to keep the dough from sticking.

Place cookies 1-inch apart on ungreased cookie sheets. Bake for 6-8 minutes.

Cool completely on a serving tray at room temperature.