In a sauce pan melt the butter over medium heat, whisk constantly until butter has turned into a gold brown color. Set aside to cool for 10-15 minutes while you work on the cookie batter.
Heat oven to 350 degrees.
In a medium bowl mix the flour, baking powder, baking soda, and salt and set aside.
In a large bowl beat the brown butter and brown sugar for 2 minutes.
Add the vanilla, and egg and mix for another minute. Add the flour 1/4 at a time. mix until fully combined.
in a small bowl combine the remaining 2 tablespoons of brown sugar and 2 tablespoons of granulated sugar. Roll dough into a 2 inch bowl and dip into the sugars. continue to roll the balls until you are done with the batter. Place on a un-greased baking sheet 2 inches apartment.
Bake for 8-10 minutes, remove from baking sheet and place on a cooling rack.