Instructions
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Step1Heat oven to 400°F.
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Step2
Mix 1 1/2 cups sugar, the butter, shortening, and eggs in large bowl until light and creamy, about 1 minute.
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Step3
Stir in flour, cream of tartar, baking soda, and salt. Mix just until the dry ingredients are incorporated, about 30 seconds.
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Step4
In a small bowl, mix 1/4 cup sugar and the cinnamon for the cinnamon sugar coating.
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Step5
Shape dough into 1 1/4-inch balls. Roll balls in cinnamon-sugar mixture. Place 2 inches apart on ungreased cookie sheet.
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Step6
Bake 8 to 10 minutes or until set. Remove from cookie sheet to wire rack to cool.