I got this recipe from my mom a few years back. I'm not sure where she got it, but I am sure that it really is Better Than Anything (or, at least, most things). It's one of my go-to party cakes--this thing will have people going up for second and third helpings. Go bake it now. Seriously, you'll thank me later!
1 box German Chocolate Cake Mix (or regular Chocolate will do)
1 can condensed milk
1 jar (14 oz) of caramel or butterscotch sundae topping
1 bag of toffee chips
Make & bake cake according to directions on the box. Let it cool for 15 minutes. Using the handle of a wooden spoon, poke holes in cake (holes should be approx 1/2 inches apart). Pour can of condensed milk over cake, allowing it to soak in. Then pour jar of sundae topping over cake, allowing that to soak in as well. Spread cool whip over the cake and sprinkle toffee chips on top. Chill for at least 2 hours before serving.