I'm not finding an abundance of recipes for that specific kind of cupcake, so I'm going to try to put something together myself and see what I can come up with. I do have a tool to insert fillings into cupcakes, etc., so I just need to find the respective recipes for the cake, filling, and icing.
As far as the blondies go, I just found a recipe titled "The BEST Blondies-Ever!" It has most of the same ingredients as the butterscotch bars I made, that is until you get to the pecans and Ghirardelli white chocolate chips. Yum! I think I'll try this recipe first and see how it goes.