Indulge in the perfect sweet treat with this delicious whoopie pie filling recipe. This creamy and fluffy filling is the ideal complement to the soft and cake-like whoopie pies. Whether you’re making them for a party or just a special treat, this filling will take your whoopie pies to the next level. Give this recipe a try and satisfy your sweet tooth cravings!

Preparation time: 15 minutes | Cooking Time: 0 minutes | Total Time: 15 minutes | Serves: Makes enough filling for 12 whoopie pies


  • 1 cup unsalted butter, softened
  • 2 cups confectioners’ sugar
  • 1 tsp vanilla extract
  • 1/2 cup marshmallow fluff
  • Pinch of salt


  1. In a mixing bowl, beat the softened butter until creamy.
  2. Add the confectioners’ sugar, vanilla extract, marshmallow fluff, and a pinch of salt to the bowl.
  3. Beat the ingredients together until the filling is smooth and fluffy.
  4. Once the whoopie pie cakes are cooled, spread a generous amount of filling onto one cake and sandwich it together with another cake.
  5. Repeat with the remaining cakes and filling.
  6. Enjoy your delicious whoopie pies with the creamy filling!

Nutrition Information:

Calories: 180 || Carbohydrates: 20g || Fat: 11g || Protein: 0g || Fiber: 0g

What I Love About This Recipe?

  1. The creamy texture of the filling complements the soft whoopie pie cakes perfectly.
  2. The marshmallow fluff adds a hint of sweetness and a light, airy consistency to the filling.
  3. Using unsalted butter allows you to control the saltiness of the filling to suit your taste preferences.
  4. The simple ingredients come together quickly to create a delicious filling that elevates the whoopie pies.
  5. This recipe is versatile and can be customized with different flavor extracts or add-ins for a unique twist.

What To Avoid While Making this Recipe?

  1. Avoid overmixing the filling, as it can become dense and lose its fluffy texture.
  2. Do not skip the pinch of salt, as it balances the sweetness of the confectioners’ sugar and marshmallow fluff.
  3. Make sure the butter is softened but not melted to ensure the right consistency of the filling.
  4. Be careful not to overfill the whoopie pie cakes with the filling, as it can squeeze out the sides when sandwiched together.
  5. Store any leftover whoopie pies in an airtight container in the refrigerator to maintain the freshness of the filling.

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