Preheat your oven to 350°F (175°C).

In a large bowl, whisk together the all-purpose flour, ground cinnamon, baking soda, baking powder, and salt. Set this mixture aside.

In another bowl, beat the softened butter and sugar together until light and fluffy (about 2-3 minutes using an electric mixer on medium speed).

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

Gradually add the dry ingredients to the wet ingredients, mixing just until combined. Be careful not to overmix.

Use a cookie scoop or tablespoon to drop the batter onto a parchment-lined baking sheet, spacing them about 2 inches apart.

Bake in your preheated oven for 10-12 minutes or until they spring back when lightly pressed.

Allow the whoopie pie rounds to cool on the baking sheet for 5 minutes before transferring them to a wire rack to cool completely.

Once cooled, take one round and spread cream cheese frosting on the flat side, topping it with another round to make a sandwich. Repeat with the remaining rounds.

Serve fresh. They stand deliciously well on their own!