INGREDIENTS
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4 3/4 cups all-purpose flour
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1 teaspoon salt
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3/4 teaspoon cream of tartar
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1 teaspoon baking soda
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1 cup unsalted butter (2 sticks)
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1 cup olive oil
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1 cup confectioners' sugar, plus more for dusting
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1 cup granulated sugar, plus more for pressing cookies
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2 large eggs
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1 teaspoon pure vanilla extract
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Finely grated zest of one orange