1 can (14 oz) sweetened condensed milk
1 jar (16 to 17 oz) caramel, butterscotch or fudge topping
1 container (8 oz) frozen whipped topping, thawed
1 bag (8 oz) toffee chips or bits
Heat oven to 350°F (325°F for dark or nonstick pan). Make and bake cake as directed on box for 13x9-inch pan. Cool 15 minutes. Poke top of warm cake every 1/2 inch with handle end of wooden spoon. Drizzle condensed milk evenly over top of cake; let stand until milk has been absorbed into cake. Drizzle with caramel topping. Run knife around sides of pan to loosen cake. Cover and refrigerate about 2 hours or until chilled. Spread whipped topping over top of cake. Sprinkle with toffee bits. Store covered in refrigerator.