To prepare a the best lavender sugar cookies ever recipe, first you need to prepare your ingredients. First, you will need your flour, baking powder, sugar, salt, and vanilla extract. Then, add your dry ingredients to the wet ingredients and mix them together until they are well combined. Next, take your cookie dough and roll it out until it is about 1/8 of an inch thick. Roll the dough into balls and place them on ungreased cookie sheets. Bake the cookies for 12 to 15 minutes or until the edges are golden brown.