oopsiDaisy~We also make biscuits & chocolate. My DH grew up on it for a special breakfast type of thing from the neighbors. Forever, they would not give him the recipe, said it was a "family recipe" and wouldn't share. So we had been asking them since we have been married, now over 14 years.
Well, a few years ago we were visiting Portland, they live about and hour and a half from there, so we called the dad (now this is the dad of my DH's friend) and my DH told him we are bringing our kids for breakfast, they need to try this stuff. So we drove almost 2 hours, he made us all breakfast and he finally gave us the recipe. So we came home & made it, and of course it tasted nothing like his. So we goggled and low and behold there it was on allrecipes.
They do call it chocolate gravy, which is what I see you have called it...but anyhow that is the recipe we now go by.

(just thought I would share, because not many people we know of know about it).