This Vintage Advertisement does not have a chocolate recipe, although it mentions chocolate layer cake, but I couldn't help but post it because it shows how far we've come--and where we've been. This is a Vintage Ad for Camels Cigarettes.
"Thanksgiving Dinner.. and then the peaceful feeling that comes from good digestion and smoking Camels. ... For Digestion's Sake--Smoke Camels."
One of the "authorities" in this ad is a Food Editor.
Hope you didn't have a Camel after Thanksgiving Dinner.