Step 1

Preheat oven to 350°F.Lightly mist 10-inch ovenproof skillet with cooking spray.

Step 2

Press cookie dough onto the bottom of prepared skillet.

Step 3

Bake for 20 to 23 minutes or until golden brown.

Step 4

Remove from oven to wire rack and immediately sprinkle the morsels evenly over the top of cookie; set aside for 3 minutes. Using an offset spatula or the back of spoongently spread softened morsels in an even layer.

Step 5

Place rack in upper third of oven and switch to broil setting. Arrange the marshmallows in single layer on top of the chocolate. Place under broiler and roast for 1 to 2 minutes or until marshmallows are nicely toasted.Watch carefully to avoid burning marshmallows. Remove from oven to wire rack.Cool completely before slicing into wedges to serve.