Food & Cooking Recipes Dessert & Treats Recipes Cookie Recipes Banana Whoopie Pies 3.5 (155) 12 Reviews By Martha Stewart Test Kitchen Martha Stewart Test Kitchen The recipes developed by our test kitchen team have undergone a rigorous process of development and testing, ensuring that every element is optimal, from ingredient amounts to method and cooking time. This process includes triple-testing recipes to ensure they meet our high standards. The many stellar cooks and food editors who have been part of our team include Sarah Carey, Lucinda Scala Quinn, Jennifer Aaronson, Shira Bocar, Anna Kovel, Greg Lofts, Riley Wofford, Lauren Tyrell, and Lindsay Leopold. Editorial Guidelines Updated on June 12, 2017 Print Rate It Share Share Tweet Pin Email Yield: 3 dozen These golden-edged banana cookies stuffed with cream cheese frosting unite two favorites -- whoopie pie and moist banana cake -- in an immensely satisfying revival. Ingredients 2 cups all-purpose flour ½ teaspoon baking powder ½ teaspoon baking soda ½ teaspoon salt ½ cup mashed banana (from 1 large ripe banana) ½ cup sour cream 4 ounces (1 stick) unsalted butter, softened ½ cup granulated sugar ½ cup packed light-brown sugar 1 large egg 1 teaspoon pure vanilla extract 16 ounces cream cheese, softened 1 cup confectioners' sugar, plus more for dusting Directions Preheat oven to 350 degrees. Line 2 baking sheets with parchment. Sift flour, baking powder, baking soda, and salt into a bowl. Combine banana and sour cream in another bowl. Beat butter and granulated and brown sugars with a mixer on medium-high speed, until pale and creamy, about 3 minutes. Add egg and 1/2 teaspoon vanilla, beating until incorporated. Add banana mixture in 2 additions, alternating with flour mixture. Transfer batter to a pastry bag fitted with a 1/4-inch plain tip. Pipe batter into 1 1/4-inch rounds on baking sheets, spacing rounds 1 1/2 inches apart. Bake until edges are golden, about 12 minutes. Slide parchment, with cookies, onto wire racks. Let cool. (Unfilled cookies can be stored for up to 1 day.) Beat cream cheese, confectioners' sugar, and remaining 1/2 teaspoon vanilla with a mixer on medium speed until smooth, about 2 minutes. Pipe or spoon 1 tablespoon cream cheese mixture onto the flat sides of half the cookies. Sandwich with remaining cookies. Dust with confectioners' sugar, and serve immediately. Rate it Print