1Line 9-inch square pan with foil; spray foil with cooking spray. In large microwavable bowl, microwave baking chips uncovered on High 1 minute to 1 minute 30 seconds, stirring every 15 seconds, until melted.
2Stir frosting into melted chips. Fold in remaining ingredients. Pour and spread into pan. Refrigerate 20 minutes or until set.
3Using foil, lift fudge out of pan; remove foil. Cut into 6 rows by 6 rows. Store tightly covered.