Ingredients
Equipment
Method
Make the apple cider reduction and prep
- Reduce apple cider in a small saucepan over medium heat until reduced by half, about 10 minutes, then cool until just warm. The liquid should look darker and more syrupy as it reduces.
- Preheat the oven to 350F and line sheet pans with parchment. The papers should lie flat so the cookie rounds bake evenly.
Mix and bake the whoopie pie cakes
- Whisk together all-purpose flour, baking soda, cinnamon, ginger, cloves, and salt in a bowl until evenly speckled. Dry ingredients should look uniform with no spice clumps.
- Beat softened unsalted butter and brown sugar until fluffy, about 2 minutes. The mixture should lighten in color and appear airy.
- Add egg, vanilla, and reduced apple cider to the butter-sugar mixture and mix until smooth. The batter should look cohesive and glossy.
- Alternate adding the flour mixture and sour cream, mixing just until combined after each addition. Stop when you no longer see dry streaks to keep the cakes tender.
- Drop 2-tablespoon rounds onto the prepared sheet pans, spacing them apart. The tops should be mounded and uniform in size.
- Bake at 350F for 10-12 minutes until the cookies puff and the centers look set. They should spring back lightly when touched.
- Cool the cakes completely on the sheet pans or racks before filling. They should feel firm and room temperature so the filling won’t melt.
Fill and assemble
- Beat cream cheese, softened unsalted butter, powdered sugar, cinnamon, and vanilla until smooth. The filling should be thick, spreadable, and free of lumps.
- Sandwich the filling between cooled cakes, pressing gently to spread to the edges. The final whoopie pies should look thick with even filling lines.
Notes
Pro tip: Reduce the apple cider until it’s visibly syrupy, then cool it so the batter doesn’t get too loose. Store assembled whoopie pies in the refrigerator up to 4 days for best texture; freeze up to 1 month with parchment between layers and thaw in the fridge. For a dietary swap, use a dairy-free cream cheese and butter substitute in the filling to make them lactose-free (texture may be slightly softer).
