Soft & Chocolatey Sourdough Whoopie Pies – Prindle Sourdough – Discover All Things Sourdough

Ingredients

• 240g all-purpose flour
• 40g King Arthur Double Dark cocoa powder
• 1 teaspoon baking soda
• ½ teaspoon baking powder
• ½ teaspoon salt
• 1 teaspoon King Arthur espresso powder
• 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
• 120g soft butter
• 100g powdered sugar
• 1 teaspoon vanilla extract
• 120g marshmallow creme
• Pinch of salt