Pre-heat grill to medium-high heat by turning on one side of the BBQ.
Divide dough in half and roll out to about a 10”-12” circle (no need to be perfect here!).
Brush one side of the dough with melted butter and carefully place dough buttered side down on the side of the grill that has been turned on. Close the lid and let the dough begin to cook for about three to four minutes. Brush the other side of the dough with melted butter and flip.
Working quickly, scatter chopped chocolate, graham cracker crumbs and peanut butter cups on grilled side of the dough. Close the lid and let the chocolate begin to melt, about two minutes.
Once the chocolate has begun to melt, move the pizza to the other side of the grill. Scatter marshmallows over the melted chocolate and close the lid for another five minutes, or until marshmallows are melted.
Remove and let sit for about five minutes. Slice and serve!