Was looking for a recipe that called for cocoa and found this one--so glad I did! After reading the reviews, I did double the cocoa (2/3 cup) and followed the rest of the recipe exactly. It came out nice and smooth and just the right thickness for our tastes. It is, by far, the best hot fudge sauce I've ever tasted! Just had some on banana/strawberry ice cream.....wow! Since I just made it, I won't know about the crystallizing--if it lasts long enough! UPDATE: I stored the fudge in a covered glass jar in the fridge, heating only what we used each time--it has NOT crystallized at all! 2ND UPDATE: Made this again, this time using Nestle Special Dark Cocoa--if you like dark chocolate, you'll love this!

Reviewed On: Jun. 11, 2009