Delicious sugar cookies made with flour, sugar, butter, and egg yolks, combined with festive sprinkles. These cookies are soft and slightly undercooked when taken out of the oven but firm up on the baking sheet.
1: Whisk together flour, cream of tartar, salt, and baking soda. Set aside.
2: Cream together butter and sugar until fluffy.
3: Add egg yolks and vanilla into the butter mixture.
4: Once mixed, add the flour mixture and mix until combined but do not overmix.
5: Add festive sprinkles to the mixture.
6: Bake until golden brown. The cookies should look soft and undercooked.
7: Let them set on the baking sheet for 10 minutes before transferring to cool completely.
