yes, this exists, and yes, I made it this weekend (not my pictures, and no source -- damn pinterest).
My friend and I were watching the Revenge premiere and thought about this dessert the entire time, so we made it. And devoured it.
1. Pop open some crescent rolls
2. Scoop nutella on each side
3. Put marshmallows inside
4. Seal the crescent roll
5. Bake at 350 for about 12 minutes