Preheat over to 350º.

In a medium bowl, combined 3 cups flour, baking powder, salt and cinnamon. Set aside.

In a large mixing bowl, cream butter and 2 cups sugar until fluffy, about two minutes. Add eggs one at a time mixing well after each addition. Add vanilla and sour cream and mix to combined. Add flour mixture stirring until just combined. Coat the cinnamon chips with 2 T. flour and stir into batter.

Spoon batter into a greased coffee cake pan. Combine 2 tablespoons sugar and 2 teaspoons cinnamon and sprinkle over the top of batter in the pan.

Bake for 50 to 60 minutes until a toothpick inserted into a crack in the center of the cake comes out clean. Remove from oven and let cool 5 minutes before removing from pan. Cool completely on a wire rack before serving.