Preheat oven to 350F. Line two large baking sheets with parchment paper and set aside.
In a large bowl, cream butter and granulated sugar together until light and fluffy.
Add the brown sugar and continue to mix with a hand mixer.
Add eggs an vanilla extract and beat until all mixed well.
In another bowl mix flour, baking powder and salt.
Add the dry ingredients to the butter mixture and mix well with a spatula.
Combine coating mixture in a small bowl and set aside.
Take 1 to 1 ½ tablespoon of cookie dough and form into a ball. Roll into the cinnamon sugar mixture.
Place balls on the baking 2 inches apart.
Bake in the oven for 8-10 minutes.
Remove from oven and let them cool for 5 minutes on the baking sheet. then tTransfer to a cooling rack to cool completely.