Preheat oven to 350°.
In a medium bowl, mix together flour, baking powder, and salt; set aside.
In the bowl of an electric mixer on medium speed, cream together the butter and sugar until pale and fluffy, about 3 minutes. Mix in eggs. Reduce speed to low; gradually mix in flour mixture. Add in cinnamon chips.
Stir together cinnamon and remaining 3 tablespoons sugar in a small bowl. Shape dough into balls; roll in cinnamon sugar. Place dough 2 inches apart on ungreased, or parchment lined cookie sheets.
Bake 10 to 12 minutes, until edges are set and golden brown, but the center is still soft. Allow cookies to cool on baking sheet for 5 minutes before removing to a wire rack to cool.