Heat oven to 350°F. Grease bottom only of 13 x 9-inch pan with cooking spray or shortening. Make and bake brownies as directed on box for 13 x 9-inch pan, using water, oil and eggs.

Set oven to broil. Immediately sprinkle marshmallows and graham crackers over warm brownies. Broil about 4 to 5 inches from heat 30 to 60 seconds or until marshmallows are golden brown. (Watch carefully — marshmallows and graham crackers will brown quickly.) Sprinkle with chocolate candy. To serve warm, cool about 30 minutes. For brownies, cut into 6 rows by 4 rows.