I found this recipe on the box of a Betty Crocker cake mix and have made it several times. It tastes great and is easy to make.
Better than almost anything cake
1 box German chocolate cake mix
(water, vegetable oil and eggs called for in the cake mix directions)
1 can (14 oz) sweetened condensed milk
1 jar (16 to 17 oz) caramel, butterscotch or fudge topping (I used caramel ice cream topping)
1 container (8 oz) Cool Whip
1 package (6 oz) toffee chips or bits
Preheat oven to 350 degrees. Make cake as directed on package for 13x9 inch pan. Cool for 15 minutes. Poke top of warm cake every 1/2 inch with handle of wooden spoon. Drizzle sweetened 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 Cool Whip over top of cake then sprinkle with toffee chips. Store covered in the fridge.