Pumpkin Whoopee Pies By Jenna Weber, Author of White Jacket Required: A Culinary Coming-of-Age Story Makes about 18 whoopee pies These cookies are very rich, almost like a cupcake, so I suggest saving this recipe for a special occasion or a rainy afternoon. The cookies are best the day you bake them; if you keep them for too long they will become a bit gummy and soft. They would also be perfect with cream cheese frosting in the ...