I forgot to stay on topic and add that I am a Ho-Ho fan. But I have only had a Yodel once and forget what it was like…
According to Wikipedia (yes I know not the be all end all but still…) whoopie pie origins are uncertain but they are common in PA and New England.
The article is wrong when it says they are available at Quincy Market in Boston and fails to mention any place else – we (Boston area) have them at almost every bakery around and most supermarkets as well. Very common. I like mine with the thicker more sugary, less fluffy, filling.[:p]