Preheat oven to 375 degrees.
Line sheet pan with parchment paper.
In a medium bowl, whisk together flour, baking powder, and salt. Set aside.
In the bowl of an electric mixer, cream butter and sugar.
Add eggs, one at a time.
Mix in vanilla.
Stir in flour mixture, being careful not to over mix.
Use a cookie scoop to scoop out dough.
Roll each scoop into a ball and roll in cinnamon sugar.
Place on prepared pan, leaving at least 3 inches between cookies.
Bake for 15 to 18 minutes, or until done.