If you have only one pan and a recipe calls for more cupcakes than your pan will make, cover and refrigerate the rest of the batter while baking the first batch. Cool the pan about 15 minutes. Then bake the rest of the batter, adding 1 to 2 minutes to the bake time.
For a more authentic hot fudge sundae cupcake, add a scoop of ice cream.
How about peanut butter sundae cupcakes? Use any variety SuperMoist® chocolate cake and frost cupcakes with marshmallow topping. Top cupcakes with a dollop of whipped cream topping and sprinkle with candy-coated peanut butter pieces and Betty Crocker® Parlor Perfect™ chocolate sprinkles.