Brownies with Marshmallow Mint Sauce 1 (16 ounce) package brownie mix 1/2 (1 pint) jar Marshmallow Crème 2 tablespoons green crème de menthe Vanilla ice cream Prepare fudge-type brownies according to package directions. Cool slightly; cut into large bars or squares. Blend together the Marshmallow Crème and crème de menthe. To serve, top each brownie with a scoop of ice cream. Spoon mint sauce over top.