LINE 8-inch-square baking pan with foil. Combine morsels and sweetened condensed milk in medium, heavy-duty saucepan. Warm
over lowest possible heat, stirring until smooth. Remove from heat; stir in 1 1/2 cups cookie pieces and vanilla extract. Spread evenly into prepared baking pan. Sprinkle with remaining 1/2 cup cookie pieces,
pressing in gently. Refrigerate for 2 hours or until firm. Lift from pan; remove foil. Cut into 48 pieces.
