Preheat your oven to 375°F (190°C) and prepare your workspace with measuring cups, a mixing bowl, a whisk, baking sheets, and parchment paper.

In a saucepan, heat 2 cups of apple cider over medium heat until it reduces to about 1/4 cup.

In another saucepan, melt 20 tablespoons of unsalted butter over low heat, stirring continuously until it turns light brown.

In a large mixing bowl, whisk together 2.5 cups of all-purpose flour, 1 teaspoon of baking powder, and 2 teaspoons of apple pie spice.

Combine the cooled brown butter with 1.25 cups of light brown sugar and 3/4 cup of granulated sugar until well mixed.

Add the large egg and the cooled reduced apple cider to the butter and sugar mixture, stirring until smooth.

Gradually mix the dry ingredients into the wet mixture until just combined, avoiding overmixing.

Drop dough onto a lined baking sheet, leaving 2 inches of space between each cookie.

Bake in the preheated oven for 9-11 minutes until edges are set and centers are slightly soft.

Remove from the oven and let cool on the baking sheet for a few minutes.

Roll warm cookies in a mixture of ground cinnamon and sugar for topping, if desired.

Serve and enjoy your delicious apple cider cookies!