Sprinkle Sugar Cookies

1: Whisk together flour, cream of tartar, salt, and baking soda. Set this aside.

2: Cream together butter and sugar until fluffy.

3: Add egg yolks and vanilla to the butter mixture and mix well.

4: Add the flour mixture to the wet ingredients and mix until combined, but do not overmix.

5: Add mix-ins like sprinkles and fold gently.

6: Bake until slightly golden brown on the edges, about 10 minutes.

7: Let the cookies set on the baking sheet for 10 minutes before transferring them to cool completely.