Preheat oven to 450° Fahrenheit and lightly grease an 8-inch baking pan or cast iron skillet.
Spread chocolate chips in an even layer in the bottom of the pan, then arrange marshmallows on top of the chocolate chips.
Bake for 5-7 minutes, or until marshmallows are toasted to your liking. Remove and let cool for 5 minutes before serving with graham crackers.