Preheat the broiler.
Twist the tops off the cookies. Arrange the cookie bottoms, cream-side up, on a baking sheet. Put a piece of chocolate on the cream filling and then top with a marshmallow, laying on its side.
Broil, watching closely, until the marshmallows are golden, about 30 seconds. Sandwich each with the remaining cookie tops. Eat while they're melted and gooey.
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