In a large bowl, combine the flour, sugar, baking powder, cinnamon, salt and baking soda. In another bowl, beat the egg, buttermilk, oil, coffee granules and vanilla until coffee granules are dissolved. Stir into dry ingredients just until moistened.
Spoon 2 tablespoons batter into greased muffin cups. Place a chocolate kiss in the center of each; top with remaining batter. Combine sugar and cinnamon; sprinkle over batter.
Bake at 425° for 16-20 minutes or until a toothpick inserted in the center comes out clean. Cool for 5 minutes before removing from pan to a wire rack. Serve warm.