Preheat the Oven: Preheat your oven to 350°F (175°C).

Prepare Your Baking Sheets: Line your baking sheets with parchment paper.

Mix the Dry Ingredients: In a small bowl, whisk together the flour, cream of tartar, baking soda, and salt.

Cream the Butter and Sugars: In a larger bowl, cream the softened butter, granulated sugar, and brown sugar together until light and fluffy.

Add in the Eggs and Vanilla: Beat in the eggs one at a time. Add the vanilla extract.

Combine Dry and Wet Ingredients: Gradually add the dry mixture to the wet mixture and use a spatula to fold until just combined.

Prepare Cinnamon-Sugar Coating: In a separate bowl, mix granulated sugar and ground cinnamon.

Roll the Dough: Scoop out about a tablespoon of dough and roll it into a ball. Roll each ball in the cinnamon-sugar mixture.

Place on Baking Sheets: Place the dough balls on prepared baking sheets, spacing them apart.

Bake to Perfection: Bake in the oven for 8-10 minutes until set but still soft in the middle.

Cool on the Sheet: Allow cookies to cool on the baking sheet for a few minutes before transferring to a cooling rack.

Enjoy with Loved Ones: Share these delightful cookies with your family!