chocolate angel food cake

Since I'm on a roll, and I'm doing chocolate stuff, here is another favorite my mom made when I was growing up. This is soooo yummy!

Ingredients
2 12 oz pkg chocolate chips
4 eggs, separated
1 pint whipped cream (or 2 containers Cool Whip)
2 tbsp sugar (do not use if you're using Cool Whip)
1 Angel food cake
1 c nuts, chopped

Melt chocolate chips. Add egg yolks and beat. Set aside and let cool. Beat the egg whites until stiff. Fold in egg whites, then the Cool Whip. Break the cake in pieces and put in a 9x13 pan. Cover cake with chocolate mix. Sprinkle with nuts (I hate nuts in my food, so I disregard). Chill several hours. Can be made one day ahead!