My mom makes a caramel cake (devil's food cake,sweetened condensed milk, caramel) that is wonderful. When I was in college, she would make one for me to bring home. My suitemates would be waiting on me on Sunday afternoons so that they could eat some.
Anyway, this is similar but uses a yellow cake mix instead of the chocolate one. It is also covered in butterfinger bars. Wonderful!
1 yellow cake mix, mix and bake according to directions
1 can sweetened condensed milk
1 jar of caramel
4 butterfinger candy bars, chopped
1 8oz. cool whip
Bake cake. When still hot, poke holes into top. Pour sweetened condensed milk and caramel over top. Sprinkle with butterfinger bars. Refrigerate overnight or at least 3 or 4 hours. Cover with cool whip and serve.