INGREDIENTS
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2½ cup all-purpose flour
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1 teaspoons baking soda
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2 teaspoons cream of tartar
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½ teaspoon cinnamon
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¼ teaspoon of salt
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2 sticks (1 cup) unsalted butter
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1¼ cup packed dark brown sugar
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½ cup granulated sugar
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1 large egg plus 1 egg yolk
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1 teaspoons vanilla extract
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1 tablespoon plain greek yogurt
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For rolling mixture:
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¼ cup sugar
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2 teaspoons cinnamon
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