These are super easy to make, because you start with Pillsbury Quick Pumpkin Bread Mix. There's a recipe on the back for muffins. I'd imagine any pumpkin bread mix would probably have muffin directions. Make the mix according to the directions.
Melt about 5 squares of semi-sweet baking choclate in the microwave and swirl it into the prepared mix. Pour the mix in muffin cups, sprinkle with sugar (raw sugar works best).
Then you just bake 'em!