Preheat oven to 350F, spray a donut pan and set aside.
Mix your flour, sugar, baking powder and cinnamon together.
Add in your wet ingredients. Chop up your butterfinger bars, set aside 1/3 of the chocolate and then add the rest to your donut batter and mix well.
Fill your donut pan and bake in the oven for 10-12 minutes.
Let donuts cool, then top with a little vanilla icing (I used Betty Crocker) you don't need a lot, just 1/2 tsp on each donut. Sprinkle remaining butterfingers on top of icing.
Nutritional info, per donut.. Calories 106.. Fat 1.1g... Saturated fat 0.3g... Carbs 19.2g... Fiber 0.5g... Sugars 11g... Protein 1.8g