Preheat oven to 375 degrees. "Pam" (vegetable spray) a Bundt pan well. Drizzle 1 tablespoon lite Karo syrup into bottom of pan. Dot with butter, sprinkle with cinnamon and add chopped nuts and/or raisins if desired. Layer 1 can of refrigerator cinnamon rolls on top of syrup later. Repeat syrup, cinnamon, butter, nuts, raisins on top of biscuits. Cover with another roll of biscuits. Repeat layers once more. Bake at 375 degrees for 35 to 45 minutes or until biscuits are not doughy in center. Turn out of pan onto plate or foil immediately.