These apple spice whoopie pies combine apple cider, applesauce, and cinnamon with creamy spiced buttercream to make an irresistible cookie cake sandwich. Reducing the apple cider and using lots of cinnamon spice are both key to the incredible flavor.
Make Ahead & Freezing Instructions: Frosting can be made 2 days in advance, covered, and stored in the refrigerator until ready to use. The frosting will be quite thick after refrigerating, so beat it with a mixer and add another Tablespoon of apple cider or even milk if needed to thin out. You can prepare the whoopie pie cookie batter, cover it tightly, and refrigerate for up to 1 day. Let it come to room temperature, then bake as directed. You can freeze the baked and filled whoopie pies for up to 3 months. Wrap them individually with plastic wrap and place in a large freezer container. Thaw wrapped whoopie pies overnight in the refrigerator or at room temperature.
Special Tools (affiliate links): Saucepan | Baking Sheets | Silicone Baking Mats or Parchment Paper | Glass Mixing Bowl | Whisk | Electric Mixer (Handheld or Stand) | Medium Cookie Scoop | Cooling Rack | Icing Spatula | Piping Bag (Reusable or Disposable) | Wilton 1A Piping Tip
Apple Cider: Use apple cider, not apple juice. The apple cider is reduced down for the cookie batter in step 1. I just use regular apple cider (not reduced) for the filling, though you could reduce down extra for the filling if desired.
Cinnamon Sugar Topping: I sprinkled cinnamon sugar on each mound of cookie dough before baking. This gave the whoopie pies an extra delicious punch of flavor. Mix 2 Tablespoons of granulated sugar with 1/4 teaspoon of ground cinnamon. Sprinkle a little onto each mound of cookie dough before baking.
Smaller Whoopie Pies: Measure 1 scant Tablespoon of batter for each cookie to yield about 28 smaller pies. Bake time is about 1 minute less.
Be sure to check out my top 5 cookie baking tips AND these are my 10 must-have cookie baking tools.