As soon as you see one, you’ll realize a Maine Whoopie Pie is a prime candidate for making a s’more in a pie iron. What’s a whoopie pie? It’s a New England (especially Maine) staple that’s basically a sandwich of two large soft chocolate cookies with a sugary filling in between. When selecting your Whoopie Pies for this recipe, be sure to find ones that will reasonably fit in your pie irons – though the trimmings are mighty good eating, too.