Heat oven to 350°F (325°F for dark or nonstick pan).

Line a 9-inch square pan with foil  allowing it to hang over two sides of the pan. Spray the bottom only with cooking spray.

Bake brownies as directed on box for 9 inch pan size (about 38 minutes).

Sprinkle with marshmallows and return to the oven for a few more minutes until marshmallows are puffy.

Remove from the oven and sprinkle with candies.  You can just throw them on or take the time like I did to make sure the colors were evenly distributed along making sure that the plain side of each candy was facing up.

In small microwavable bowl, microwave chips and cream uncovered on High for 10 seconds and stir. Microwave in 5 second intervals, stirring each time until chips and melted.

Drizzle over bars. Cool completely, about 1 1/2 hours. Remove brownies from pan using the foil.  Using a knife sprayed with non-stick cooking spray cute brownies into 4 x 4 rows. This works best if you have a knife that is as wide or wider than the pan of brownies. Makes 16 brownies.