Preheat oven to 350°F and cover baking sheet pan in parchment paper or aluminum foil. (The melted marshmallows are going to make some kind of a mess if you don’t!)
First, melt your butter in a small dish. In another dish, mix your cinnamon and sugar. Prepare your marshmallows and get your crescent rolls out of the can.
Dip the marshmallow first in the melted butter, and roll it around. Then roll it in the cinnamon-sugar mixture.
Wrap the marshmallow well in the crescent roll and pinch them closed where the dough meets.
Spread them out on the cookie sheet that you already lined with parchment paper. Bake the rolls for 10 to 12 minutes until they are golden brown.
Allow the rolls to cool for about 10 minutes before serving.