I bought all the ingredients to make s’mores yesterday and realized I ran out of sticks right before we were ready to ROLL. UGH! My kids were in a PANIC. I decided to just throw them in the broiler and roll with it. I laid everything flat and kept the marshmallows exposed.
I kept an eye on it all – my oven has uneven heat. So, I just kept checking to see when the tops of the marshmallows browned. It took about 5-7 minutes. The chocolate melted as well which was a treat. When you do proper s’mores, the chocolate is always hard. I hate that! This was oh so gooey! 
Then I just picked two graham crackers and folded them on top of one another and served. Total heaven!
Enjoy!!