Since there were so many requests for the recipe I thought this would be easier than sending it to everyone.
I normally make cake and cupcakes from scratch but I was in a rush this time so I used a boxed cake mix.
For the frosting:
1/2 cup (1stick) softened butter
1 cup creamy peanut butter
4 cups powdered sugar
Start with 1/3 cup cream
Note: I used heavy cream
So...with a hand or stand mixer mix the butter and peanut butter until fluffy and smooth. Add half the powdered sugar to the combination and mix. Then add the heavy cream. After adding the cream, if the mix is still thick add a bit more. Then add the rest of the powdered sugar, if more cream is needed mix in until you reach your desired consistency.
I have a piping tool that gets the jelly in the middle of the cupcake but if you don't have one then you could use a condiment squirt bottle. You have to use your best judgement on how much jelly goes in the middle. If you put too much the cupcake won't hold together it will fall apart and if you don't put enough you will miss out on the peanut butter and JELLY part! ;-)
Put the frosting on top and enjoy!!!