Ingredients

1 1/2 tablespoons unsalted butter 

4 1/2 cups mini marshmallows (7 1/2 ounces) 

3/4 cup semisweet chocolate chips 

Preparation

Melt butter in a medium saucepan over medium-low heat. Add marshmallows; cook, stirring, until just beginning to melt. Add chocolate and; stir until smooth.