I remember making this with Mom for Christmas. It seemed to take so long as a kid! We skip the nuts. Don't bother making "easy" microwave fudge--it never tastes as good and this is pretty fast.
Couldn't find a link. Pg. 176 in Cook's Illustrated The Best 30-Minute Recipes. I'd say serve it with a salad except we usually just eat this as the main and only dish.