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Banana Bread Whoopie Pies with Fluffy Vanilla Bean Frosting

Soft and fluffy banana flavored cookies filled with a luscious frosting.

Prep Time
30 mins
Cook Time
30 mins
Total Time
1 hr 10 mins
Servings: 24
Course: Dessert
Cuisine: American

Ingredients

  • 2 cups all-purpose flour
  • 1/2 tsp baking powder
  • 1/2 tsp baking soda
  • 1/2 tsp salt
  • 1 cup mashed overripe bananas (about 2 large)
  • 1/4 cup sour cream
  • 1/2 cup butter , softened
  • 1/2 cup granulated sugar
  • 1/2 cup packed light-brown sugar
  • 1 large egg
  • 1 recipe Fluffy Vanilla Bean Frosting
Fluffy Vanilla Bean Frosting
  • 1 cup salted butter , at room temperature
  • seeds from two small vanilla beans I sell them!
  • 4 cups powdered sugar
  • 2 1/2 Tbsp milk
  • 1 tsp vanilla extract

Instructions

    Cup of Yum
  1. Preheat oven to 350 degrees. In a mixing bowl, whisk together flour, baking powder, baking soda and salt, set aside. In a separate mixing bowl, whisk together mashed banana and sour cream, set aside.
  2. In a large mixing bowl, using an electric hand mixer on medium-high speed, whip together butter, granulated sugar and light-brown sugar until pale and fluffy, about 3-4 minutes. Blend in egg. Add banana mixture and mix until combine. Slowly add dry ingredients and mix just until combine. 
  3. Scoop dough by rounded tablespoon fulls (about 1 1/2 Tbsp) and drop onto Silpat or parchment lined baking sheets placing them about 1 1/2 inches apart, then smooth edges and flatten cookie as needed (diameter of cookie should be about 1 1/2 - 2 inches. 
  4. Alternately you can fill a pastry bag fitted with a 1/4 inch plain tip with batter, then pipe dough into 1 1/2 inch rounds onto baking sheet - if you do this method you may get more than 2 dozen pies). Bake in preheated oven for 12 - 13 minutes until edges are golden. 
  5. Allow to cool 2 minutes on baking sheet then transfer to a wire rack to cool completely. Spread and sandwich a layer of frosting between two cookies. Store in an airtight container (in refrigerator if not serving within a few hours) .
Fluffy Vanilla Bean Frosting
  1. In a large mixing bowl, using an electric hand mixer on medium high speed, whip butter and vanilla bean seeds until pale and fluffy, about 4 minutes. Add powdered sugar, milk and vanilla extract and blend 2 minutes until light and fluffy.
  2. Recipe Source: cookie portion adapted slightly from Martha Stewart, frosting - Cooking Classy