Preheat oven to 350F. Spray down an 8x8-inch pan. Mix together the flour, baking powder, salt, and cinnamon; set aside. In a large bowl, cream together the butter and brown sugar; beat in the egg and vanilla until smooth. Combine the flour mixture and the wet mixture and mix until well-blended. Stir in the cinnamon chips. Spread the thick batter evenly in the prepared pan (and do it quickly so you're not tempted to eat it all before it's baked). Combine the sugar and cinnamon in a little bowl and evenly sprinkle the mixture over the top of the batter. Bake 25 minutes or until surface springs back when gently pressed. Cool slightly. While still warm, cut into bars with a sharp knife.