Used my own pumpkin bread recipe that I love! Some of them I just plopped the cream cheese on top and they turned out looking nicer. And only baked for 17 mins. See Brooke Cook: Pumpkin Cream Cheese Muffins
Made this yesterday - VERY yummy! Next time around I think I might try making mini muffins and save the peanut butter cups to push into the center of the filled muffin cups instead of mixing them into the batter bowl.