Apple Cider Whoopie Pies with Caramel & Buttercream Filling - Yummy Gusto

Ingredients

• 2 1/2 cups all-purpose flour
• 1 teaspoon baking soda
• 1 teaspoon baking powder
• 1/2 teaspoon salt
• 1 teaspoon ground cinnamon
• 1/2 teaspoon ground nutmeg
• 1/4 teaspoon ground cloves
• 1/2 cup unsalted butter, softened
• 1 cup light brown sugar, packed
• 1 large egg, room temperature
• 1 teaspoon vanilla extract
• 1 cup apple cider, reduced to 1/4 cup
• 1/2 cup whole milk
• 3 cups powdered sugar
• 1/4 cup reduced apple cider
• Pinch of salt
• 1/2 cup caramel sauce
• Pinch of flaky sea salt (optional)