Preheat the oven to 350°F (175°C).

In a mixing bowl, cream together the softened butter, granulated sugar, and brown sugar until light and fluffy.

Add the eggs one at a time, mixing well after each addition. Stir in the apple cider.

In another bowl, whisk together the flour, cream of tartar, baking soda, cinnamon, and salt.

Gradually add the dry ingredients to the wet ingredients, mixing until just combined.

In a small bowl, combine the granulated sugar and cinnamon for the coating.

Using a cookie scoop, form balls of dough and roll them in the cinnamon sugar mixture.

Place the coated dough balls on a baking sheet lined with parchment paper, spacing them about 2 inches apart.

Bake in the preheated oven for 8-10 minutes, or until the edges are lightly golden.

Remove from the oven and let cool on the baking sheet for a few minutes before transferring to a wire rack to cool completely.