Mix together the flour, granulated sugar, baking powder, and salt.
Cut the butter into slices and add to flour mixture. Cut the butter into flour mixture using a pastry blender or two knives.
Add the sour cream, egg, vanilla, and cinnamon chips. Mix with a fork until mixture comes together. DO NOT over mix.
Gather dough in a lump and gently knead 5 or 6 times. This can be done in the bowl or on a lightly floured surface.
Divide dough in half and form it into two circles on a greased cookie sheet. Cut the circles into eight wedges with a long, sharp, floured knife but DO NOT separate the wedges.
Bake at 425°F for 14 to 16 minutes, or until golden brown.