Return to the oven and bake for 20-25 minutes (or until a toothpick inserted in the center comes out with a few moist crumbs clinging to it) until brownies are almost fully cooked. Remove from oven and turn on the broiler.
Top the brownies with the Cornbread Crisps, marshmallows, and ½ cup chocolate chips. Return to the oven, and heat until marshmallows are golden brown (2-3 minutes). Watch carefully.
Remove from oven and allow to cool completely before slicing.