Preheat the broiler and position an oven rack about 6 inches from the heat source.

In a small oven-safe skillet, warm the heavy cream over low heat on the stovetop until it just begins to steam, about 2 minutes.

Stir in the chocolate chips and keep stirring until fully melted and thick enough to coat the back of a spoon.

Remove from the heat and scatter the mini marshmallows evenly over the top in a single layer.

Broil for 1 to 2 minutes, watching closely through the oven door, until the marshmallows are golden brown and puffed.

Let stand for 2 minutes so the top cools slightly, then dip graham crackers and strawberries while the marshmallow is still soft.