Crackled Sugar Cookies

• 1/2 cup butter
• 1/2 cup shortening
• 2 cups granulated sugar
• 1 teaspoon baking soda
• 1 teaspoon cream of tartar
• 1/8 teaspoon salt
• 3 egg yolks
• 1/2 teaspoon vanilla
• 2 cups flour

1. In large bowl, beat butter and shortening on high for 30 seconds.
2. Add sugar, baking soda, cream of tartar and salt and beat until combined.
3. Beat in egg yolks and vanilla until combined.
4. Mix in flour until well combined.
5. Shape into 1 inch balls and place 2 inches apart on ungreased cookie sheets.
6. Bake at 300 degrees for about 20 minutes or until tops are just slightly crackled and sides are set.
7. Do not let edges brown -- if they do they are over done and will not be tender.
8. Transfer to wire rack to cool.
9. May freeze up to 3 months.

butter, shortening, sugar, baking soda, cream of tartar, salt, egg yolks, vanilla, flour

Taken from www.food.com/recipe/crackled-sugar-cookies-140096 (may not work)