Loaded S'mores Dip

I can't remember where on the internet I first heard of s'mores dip, but long after I'd lost the link I decided to reverse-engineer it, with a couple added ingredients. 

• 2/3 C chocolate chips
• 2 Tbsp peanut butter
• 12 large marshmallows, cut in half
• 1 banana, coined, with coins cut in half
• graham crackers

1.  Preheat oven to 450°F.  Divide chocolate chips between two cast-iron mini skillets (5 inches top diameter), covering the bottoms.  Dollop peanut butter over chocolate chips in several places.  Top with marshmallow halves, cut side down.
2.  Bake at 450°F for 7-9 minutes.  Remove from oven, stir briefly, and scatter banana pieces into dip.  Serve with graham crackers for dipping.

Robyn's notes: this is definitely delicious, but very rich.  I've always enjoyed peanut butter with banana, and fluffernutters are popular with a lot of people, so it's kind of a combination of s'mores and those two things.  I think the cool fresh banana adds something to the otherwise thick hot dip.

*** 3 Stars: Good. At least one of us liked this enough for me to make it again, but not often