I've made these twice, and have not actually made them exactly like the recipe yet, since I only had peanut butter chips (not butterscotch) and semi sweet chocolate chips (not white chocolate). However, we liked them so much the first time, that I just made them "wrong" again the second time!
If you're not a marshmallow fan, don't despair, these have just enough that it makes them nice and soft and gooey and delicious...
Here is the recipe!
One of the things I like the best about this recipe is that it makes 8x8 pan, not 9x13, so it's a reasonable amount to eat (with friends!) and not have tons of leftovers to then have to eat, too =)