In a medium size bowl, cream together the softened butter, 1/4 cup granulated sugar, and 1/4 cup brown sugar until well combined. Then, stir in the egg and vanilla extract until just combined.
In another bowl, whisk together the 1 teaspoon cinnamon, flour, baking powder, baking soda, and salt.
Combine the wet and dry ingredients and stir until a soft dough ball forms. Cover and chill in the refrigerator for at least 30 minutes or up to overnight.
In a small bowl, stir together the 1 tablespoon granulated sugar and 1 teaspoon cinnamon. Divide the chilled dough into 12 balls and roll in the cinnamon sugar mixture.
Bake at 350°F for 10-12 minutes. Allow to cool on a cooling rack just after baking.