The name of this dessert says it all. I got it from a friend, and it really is addicting. However, it slides down surprisingly easily considering how rich it sounds. It is made using a triffle bowl, but a large salad bowl (with rather upright sides) will also work.
Prepare brownie mix using the receipt for "cake-like" brownies. While still warm and in the baking pan, poke brownies with a fork. Pour all of the Kahlua over the baked brownies.
Prepare chocolate pudding according to instructions and refrigerate until slightly set. Use half of the pan of brownies and line the bottom of the bowl. (do not crumble them, but try to get pieces as large as possible). Press lightly up the sides of the bowl. Cover with half of the prepared chocolate pudding; then half of the container of Cool Whip. Sprinkle with 1 chopped Heath Bar (or half of the package). Repeat layers with remaining ingredients. Top with the Chopped walnuts. Refrigerate.
Not exactly low cal, but enjoy anyway! Cheers!