Step 1

Place graham cracker crumbs into a bowl, add sugar and melted butter, and mix until well combined. Transfer mixture into a 9-inch pie dish. Gently press graham cracker mixture into the bottom and up the sides of the pie dish using a spatula. Pat the edge and inside of the crust smooth with your fingers.

Step 2

Refrigerate crust until thoroughly chilled, at least 30 minutes.

Step 3

Fill crust with chocolate ice cream using a small ice cream scoop. Smooth the ice cream with a spatula. Place a ring of mini marshmallows around the inside of the crust and cover top of ice cream with remaining marshmallows. Gently press marshmallows into the ice cream.

Step 4

Freeze until very firm, at least 2 hours.

Step 5

Use a propane blow torch to toast the marshmallows, moving the torch quickly to brown the marshmallows. Marshmallows should have small charred spots. Return to freezer to chill the marshmallow topping, at least 3 hours; slice and serve.