Dugans was Dugans Not "intertwining anything. Never heard of Interstate. Drakes was store bought-second rate items -still are in my opinion!
I'm glad all of you got so involved and excited about the Nostalgia...All I ever wanted when I posted the original query was a dupe-recipe for the icing on the Dugans Cup Cakes Trucks not my interest. Have Fun anyway and if anyone remembers the flat shiny vanilla or chocolate icing (not frosting) and knows how to make it please let me know. Never knew where their factory was. Didn't much care. :-)
I was replying to Wright-Holder's post, not yours. I think she was confusing Dugan's and Drake's in his/her mind. I knew people in my neighborhood who worked for Dugan's Bakery when I was growing up, and went to high school near Drake's Brooklyn bakery before the move to Wayne, NJ.
Frankly, I don't think any more of the Dugan's recipes are going to surface. The reason is that most of the people who worked at Dugan's are now DEAD. The last Dugan's bakery closed in 1966 with the bankruptcy of Noramco, and I don't it ever reopened after bankruptcy proceedings started.
This is primarily a site about restaurants and food prepared at home, not about recipes used by wholesale bakeries (and Dugan's was definitely a wholesale bakery.)
Even if some recipes were to surface, they might not taste the same since some of the ingredients, no doubt made for the commercial bakery market, may no longer be available.
You might find better advice for making a cup cake icing over at this cake forum: http://www.cakecentral.com/cake-decorating-forums.html