Description
If you’re looking for the perfect way to use up extra sourdough starter or discard, these Sourdough Whoopie Pies are a must-try! Rich chocolate cake-like cookies sandwich a fluffy marshmallow filling, creating a nostalgic treat that’s soft, decadent, and impossible to resist.
The addition of sourdough starter adds depth of flavor and helps create an incredibly tender texture without making the dessert taste sour. Whether you’re baking for family gatherings, holidays, bake sales, or simply satisfying a chocolate craving, these homemade whoopie pies are guaranteed to be a crowd favorite.
Ingredients
Dry Ingredients
- 240g all-purpose flour
- 40g King Arthur Double Dark cocoa powder
- 1 teaspoon baking soda
- 1/2 teaspoon baking powder
- 1/2 teaspoon salt
- 1 teaspoon King Arthur espresso powder
Wet Ingredients
- 180g Buttermilk or 160g milk 20g vinegar or lemon juice
- 120g Butter (for creaming)
- 150g Sugar
- 1 Egg
- 1 tsp Vanilla extract
- 80g Sourdough starter or discard
Marshmallow Filling
- 120g soft butter
- 100g powdered sugar
- 1 teaspoon vanilla extract
- 120g marshmallow creme
- Pinch of salt
Instructions
- Preheat oven to 350°F (175°C). Line baking sheets with parchment paper.
- If you don’t have buttermilk, combine milk and vinegar or lemon juice. Let sit for 5–10 minutes to create a homemade buttermilk.
- In a bowl, whisk together flour, cocoa powder, baking soda, baking powder, salt, and espresso powder.
- In a separate bowl, cream butter and sugar until light and fluffy.
- Beat in egg and vanilla.
- Mix in sourdough starter and buttermilk until combined.
- Add dry ingredients in two additions. Mix until just combined.
- Scoop portions using a cookie scoop . 1 tablespoon scoop will give you bite size whoopie pies, 2 tablespoons of batter will give you medium size pies, and a 3 tablespoon scoop will give you a large whoopie pie.
- Bake for 9-10 minutes for 1 Tbls size, 12–13 minutes for 2 Tbls size, 14-15 minutes for 3 Tbls size, or until the tops spring back when lightly touched.
- Allow to cool completely.
Marshmallow Filling Instructions
- Beat butter until smooth and fluffy.
- Add powdered sugar, vanilla, and salt.
- Beat until fully combined.
- Beat in marshmallow creme until smooth and creamy.
- Match cooled cakes by size.
- Pipe or spread filling onto one cake and top with a second cake to create a sandwich.
- Refrigerate to set the marshmallow filling.
Notes
Final Thoughts
These Sourdough Whoopie Pies are the perfect combination of rich chocolate flavor and fluffy marshmallow filling. They’re an excellent way to use extra sourdough starter while creating a bakery-worthy dessert that everyone will love.
Whether you’re a seasoned sourdough baker or just looking for creative discard recipes, this easy whoopie pie recipe deserves a spot in your collection. One bite of these soft chocolate sandwiches, and you’ll understand why they disappear so quickly!
- Prep Time: 60 Minutes
- Cook Time: 15 minutes
- Category: desert