Bake 27 to 33 minutes or until toothpick inserted in centre comes out clean. Cool 15 minutes. Poke top of warm cake every 1/2 inch with handle of wooden spoon, wiping handle occasionally to reduce sticking. Reserve 1/2 cup caramel topping. Drizzle remaining caramel topping evenly over top of cake; let stand about 15 minutes or until caramel topping has been absorbed into cake. Run knife around side of pan to loosen cake. Cover and refrigerate about 2 hours or until chilled.