That's a decent size, snarky. I agree with you about the filling being TOO darn sweet in many of the recipes! It's like sinking your teeth into a bag of sugar ONLY. My tastebuds get so overwhelmed that I can't even taste the flavor of the cake. Of course, I realize many people like the filling super sweet. However, yours are selling like hotcakes, so I would say there are a lot of people out there who maybe want LESS sweet sweets, like me.
Please post a picture, and do tell us more about why your cakes are "chewy." It sounds quite interesting, and I'm always looking for a new whoopie pie filling and cake recipe. Oh, by the way, where are you located? The reason I ask is because you are getting a GOOD price for your whoopie pies, and I don't think ANY whoopie pie, no matter how good (and I'll bet yours are great!), would sell for that price here in Maine. Thanks!