To prepare a brown butter snickerdoodles with white chocolate recipe, first you'll need to prepare your ingredients. First, you will need your flour, baking powder, sugar, and salt. Then, add your dry ingredients to the wet ingredients and mix until everything is well combined. Next, preheat your oven to 375 degrees F (190 degrees C) and grease your cookie sheet with non-stick cooking spray. Add your butter and brown sugar and stir until the butter is completely melted and the sugar is dissolved. Finally, stir in your vanilla and vanilla extract. Pour the batter into the prepared baking sheet and bake the cookies for 20 to 25 minutes or until they are golden brown.