Combine the banana, yogurt and sugar in a small bowl and set aside.
Combine the flour, baking powder, salt and cinnamon in a large mixing bowl. Using a pastry blender, cut in butter until mixture resembles coarse crumbs. Make a well in the center of the dry ingredients and then add the banana mixture. Stir just until combined. Turn dough out onto a floured surface. Sprinkle the surface with the mini chocolate chips and knead them into the dough using extra flour to keep the dough from sticking. Pat the dough into a 9 inch circle and cut into 8 wedges. Place wedges onto a baking sheet lined with parchment paper.
Bake for 20 to 30 minutes or until golden brown and firm to the touch.