Microwave butter and 2 oz. semi-sweet chocolate in large microwaveable bowl on HIGH 1 min. Add marshmallows; toss to evenly coat. Microwave 1 min. or until marshmallows are completely melted and mixture is well blended. Add cereal; mix well.
Use moistened hands to press cereal mixture onto bottoms and ¾ the way up sides of 10 muffin pan cups sprayed with cooking spray.
Beat pudding mix and milk with whisk 2 min. Spoon into crusts. Refrigerate 1 hour.
Melt remaining semi-sweet chocolate as directed on package; cool 10 min.
Spoon COOL WHIP onto pies just before serving; drizzle with melted chocolate. Garnish with sprinkles.
Recipe by 5* trending recipes with videos at https://food.theffeed.com/2018/12/01/mini-chocolate-pudding-pies/