Peanut Butter Banana Whoopie Pies
Prep time
Bake time
Total time
The graham cracker crumbs in the peanut butter filling is an optional ingredient, I like it because it tastes more like a true Reese's Peanut Butter Cup filling, but you can leave it out with no changes to the recipe
The buttercream addition is also an optional ingredient, but will make the filling creamier
Serves: 10 whoopie pies
  • For the Whoopie Pies:
  • Mashed Banana 1 cup (240g) (approx 2 medium bananas)
  • Granulated Sugar 1 cup (200g)
  • Vegetable Oil ½ cup (120ml)
  • Ground Flax 1 tablespoon (8g)
  • Hot Water 2½ Tablespoons
  • Vanilla Extract 2 teaspoons
  • All Purpose Flour 2 cups (250g)
  • Baking Powder 1 teaspoon (5g)
  • Baking Soda 1 teaspoon (5g)
  • Ground Cinnamon ½ teaspoon
  • Ground Nutmeg ¼ teaspoon
  • Salt ½ teaspoon (3g)
  • For the Peanut Butter Filling:
  • Creamy Peanut Butter 1 cup (260g)
  • Confectioners Sugar ½ cup (60g)
  • Salt ¼ teaspoon
  • Vanilla Extract 1 teaspoon
  • Graham Cracker Crumbs *optional ¼ cup (28g)
  • Vegan Buttercream*optional ½ cup
  • ¼ Recipe Ganache *optional
  1. For the Whoopie Pies:
  2. Combine the ground flax with the hot water and whisk to a paste, let stand for at least 5 minutes to thicken
  3. Combine the oil, mashed banana, sugar, vanilla extract and flax paste together in a large mixing bowl with a hand whisk.
  4. Sift together the flour, spices, baking powder, baking soda and salt and add to the wet mixture, whisk until smooth.
  5. Preheat the oven to 350°F and while you wait - refrigerate the batter
  6. Scoop the batter onto a parchment paper lined sheet pan with a 1½ ounce scoop spaced 2" apart and bake for approximately 12-15 minutes or until lightly golden brown.
  7. They will be puffed and springy when you press the centers..
  8. Cool completely before filling with the peanut butter buttercream recipe follows.
  9. For the Peanut Butter Filling:
  10. Combine all the ingredients for the peanut butter filling together except for the buttercream.
  11. Cream it all smooth by hand with a spatula or with a mixer.
  12. Add the optional buttercream last
The whoopie pies filled with filling (minus the fresh bananas) will last for 2-3 days at room temperature stored in an airtight container.

You may freeze for longer storage wrapped well for up to 1 month
Recipe by Gretchen's Vegan Bakery at