Finely chop remaining Snickers™ bites. In medium bowl, microwave chocolate chips and shortening uncovered on High 60 to 90 seconds or until mixture can be stirred smooth. Using 2 forks, dip and roll chilled balls, one at a time, in melted chocolate. Return to baking sheet; immediately top with finely chopped Snickers™ bites. If chocolate has cooled too much, reheat. Refrigerate brownie bites about 20 minutes or until coating is set. Store covered in refrigerator.