Ever heard of a whoopie pie? They're a bit like a macaroon but with a more cake-like texture. Hugely popular Stateside, the name comes from when Amish women would put them in farmers' lunchboxes and they'd supposedly shout 'whoopie' if they found one in their box!. To Make Whoopie Pie Filling: Beat egg white and mix with the milk, 1 teaspoon vanilla and 125g of the icing sugar. Mix well then beat in the butter and the remaining sugar. Beat until light and fluffy.. 496 results for whoopie pie Save whoopie pie to get e-mail alerts and updates on your eBay Feed. Unfollow whoopie pie to stop getting updates on your eBay feed.. Cook's Note: Make sure all of your ingredients are at room temperature. Preheat your oven to 400 degrees F. Line 2 baking sheets with parchment paper.. Delicious whoopie pies are a longstanding tradition at the Bird-in-Hand bakery. I have frequently enjoyed them. In recent years, the bakery has become associated with Amazon making ordering easier than it was.. #HowItsMade Mondays 9/8c on Science This Whoopie Pie factory has a variety of delicious ingredients that give these traditional treats their signature taste..