LINE 9x5-inch loaf pan with plastic wrap. Cut chocolate ice cream crosswise in half, then cut each half into 4 slices. Place 4 slices on bottom of prepared pan; press to form even layer covering bottom of pan. Reserve 1/2 cup chopped cookies; set aside.
SPRINKLE half the remaining cookies over ice cream layer in pan. Cover with vanilla ice cream; press firmly to form even layer. Top with remaining chopped cookies. Cover with remaining chocolate ice cream slices; press firmly to completely cover cookie layer. Freeze 3 hours or until firm.
INVERT dessert onto platter just before serving. Remove pan and plastic wrap. Top dessert with reserved cookies.