EASY oreo truffles

1 pkg. (1 lb., 2 oz.) OREO Chocolate Sandwich Cookies, divided
1 pkg. (8 oz.) PHILADELPHIA Cream Cheese, softened
2 pkg. (8 oz. each) BAKER'S Semi-Sweet Baking Chocolate, melted

CRUSH 9 of the cookies to fine crumbs in food processor; reserve for later use. (Cookies can also be finely crushed in a resealable plastic bag using a rolling pin.) Crush remaining 36 cookies to fine crumbs; place in medium bowl. Add cream cheese; mix until well blended. Roll cookie mixture into 42 balls, about 1-inch in diameter.
DIP balls in chocolate; place on wax paper-covered baking sheet. (Any leftover chocolate can be stored at room temperature for another use.) Sprinkle with reserved cookie crumbs.
REFRIGERATE until firm, about 1 hour. Store leftover truffles, covered, in refrigerator.