INGREDIENTS
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1/2 c. butter, at cool room temperature
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1/2 c. shortening
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1 1/2 c. granulated sugar
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2 large eggs
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1 tsp. vanilla extract
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2 3/4 c. all-purpose flour
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1 tsp. cream of tartar
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1 tsp. baking soda
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1/4 tsp. salt
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1/3 c. granulated sugar
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1 1/2 tsp. ground cinnamon