Preheat oven to 450 degrees. Brush a large cast iron skillet or casserole dish with melted butter.
Spread chocolate chips into an even layer over the butter and add the marshmallows vertically. Don’t worry if there are some gaps, the marshmallows will expand in the oven!
Bake in the pre-heated oven for 7-8 minutes, until nice and golden! (to your liking)
Add Nutella and coconut oil to a microwave safe bowl and microwave in 30 second intervals, stirring in between until melted and creamy. Drizzle over the toasted marshmallows and serve with graham crackers while hot! ENJOY!!!