• ½ cup butter, unsalted
  • ½ cup shortening
  • 1⅔ cup sugar
  • 1 teaspoon baking soda
  • 1 teaspoon cream of tartar
  • ⅛ teaspoon salt
  • ½ teaspoon vanilla
  • 3 egg yolks
  • 1¾ cup flour
Instructions
  1. Preheat oven to 300 degrees.
  2. Cream butter & shortening on medium until combined. Add sugar, baking soda, cream of tartar and salt. Continue beating until fluffy, scraping the sides of the bowl as needed.
  3. Add in egg yolks & vanilla until combined.
  4. Beat in flour a little bit at a time. Divide into 24 even pieces and roll into balls.
  5. Bake 15-17 minutes or just until set (you do not want the cookies to brown). Cool on the cookie sheet about 3 minutes and cool completely on a wire rack.

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