Preheat oven to 350F. Line cookie sheets with parchment paper.
In a small bowl sift together flour, baking powder, and salt in a medium bowl. Set aside.
In a large mixing bowl or stand mixer cream together butter, Nutella, sugar, and brown sugar until light and fluffy. Stir in eggs, then mix in dry ingredients. Mix until well combined.
In a small mixing bowl stir together the remaining 3 tablespoons of sugar and 1 ½ teaspoons of cinnamon.
Scoop balls of cookie dough, I used my cookie dough scooper. Roll the cookie dough pieces into the cinnamon and sugar mixture. Place cookie dough on the cookie sheet once rolled in the cinnamon and sugar.
Place cookies in preheated oven and bake for 10-12 minutes.
Slightly cool cookies on the cookie sheet before removing and devouring.