"Their book delivers more than (marshmallow) fluff. Their recipes offer new ideas for mixing and matching flavors and fillings." — Tasting TableIs it a cake? Is it a cookie? With such deliciously soft and sweet cream-filled snacks, does it matter? The Internet is abuzz with recipes and stories of whoopie pie folklore, while customers everywhere are descending on bakeries in droves demanding these delectable treats. This adorable volume—the only cookbook dev...