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

Line 8- or 9-inch square pan with foil so foil extends about 2 inches over sides of pan.

Spray foil with cooking spray.

Make brownies as directed on box.

Cool completely, about 1 hour.

Place brownies in freezer for 30 minutes.

Remove brownies from pan by lifting foil; peel foil from sides of brownies.

Cut into 15 rectangular bars, 5 rows by 3 rows.

Gently insert craft stick into short end of each bar, peeling foil from bars.

Place on cookie sheet; freeze 30 minutes.

In small microwavable bowl, microwave chocolate chips and shortening uncovered on High about 1 minute; stir until smooth.

If necessary, microwave additional 5 seconds at a time until desired consistency.

Dip top third to half of each brownie into chocolate; sprinkle with candy sprinkles.

Lay flat on waxed paper or foil to dry.