In medium microwavable bowl, microwave chocolate chips and whipping cream uncovered on High 1 minute; stir. Microwave in 10- to 15-second intervals, stirring after each, until mixture is smooth. Spoon generous teaspoonful on top of each peppermint pattie on cookie; spread to cover candy. Sprinkle with candy sprinkles. Refrigerate cookies until set, about 15 minutes. Store covered in airtight container at room temperature with waxed paper between layers.