Start pre-heating your oven to 350°F (176°C). Take butter out of fridge.

Combine the Ingredients

Whisk the flour, cream of tartar, baking soda, and salt in a large bowl until combined. Set aside.

Beat the room temperature butter until it’s smooth and creamy, then add the sugar and mix until it becomes light yellow and fluffy. 

Add the vanilla to your butter and sugar mixture and mix until combined.

Next, add eggs one at a time, beating until each is well incorporated.

Spoon in ⅓ of your dry ingredient mixture and mix until incorporated. Add another ⅓ and mix. Finally, add the final ⅓ of dry ingredients and stop mixing when everything comes together.

Shape & Coat the Dough, Bake

Roll 1.5 tablespoons of the snickerdoodle cookie dough into a ball and coat in the cinnamon-sugar mixture.

Immediately after rolling the snickerdoodle cookie dough in cinnamon sugar, place on a parchment-lined baking sheet 2-inches apart.

Bake the cookies at 350°F (176°C) for 9-11 minutes.

Let them cool then serve!