In small microwavable bowl, microwave chocolate chips, 1/4 cup of the whipping cream and the butter uncovered on High 30 seconds. Stir; continue to microwave in 15-second increments, stirring after each, until smooth. Spoon 1 generous teaspoon chocolate mixture in center of each cookie. Immediately top each chocolate-filled cookie with a pecan half, slightly pressing into chocolate. Let stand about 15 minutes or until chocolate starts to set.