Preheat your oven to 350°F (175°C).

In a mixing bowl, whisk together the flour, baking powder, baking soda, cinnamon, nutmeg, and salt.

In another bowl, cream together the butter, brown sugar, and granulated sugar until light and fluffy.

Add in the egg, apple cider, and vanilla extract, mixing until well combined.

Gradually add the dry ingredient mixture to the wet mixture, stirring gently until combined.

Drop tablespoonfuls of dough onto a parchment-lined baking sheet, spacing them about 2 inches apart.

Bake for 12-15 minutes, or until the cookies are set and lightly golden at the edges.

Let the cookies cool on a wire rack completely before filling.

Once cooled, spread a generous amount of caramel sauce on the flat side of half of the cookies and top with the remaining cookies.

Drizzle additional caramel sauce over the assembled whoopie pies for extra sweetness.

Serve and enjoy your delightful apple cider whoopie pie cookies!