PREHEAT oven to 350° F. Grease 9-inch springform pan.
PLACE whole bar of dough in prepared pan. Allow to soften for 5 to 10 minutes. Using fingertips, pat dough gently to cover bottom.
BAKE for 18 to 19 minutes or until light golden brown. Cool completely in pan on wire rack.
SPOON ice cream over cooled cookie base. Smooth top. Dollop whipped topping around edge of ice cream. Sprinkle with Toppers. Cover; freeze for at least 4 hours. Let stand for 10 minutes before removing side of springform pan and cutting into slices.