INGREDIENTS
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3/4 cup cake flour
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3/4 cup all-purpose flour
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1 teaspoon white sugar
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1/2 teaspoon salt
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1/8 teaspoon baking powder
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4 tablespoons unsalted butter
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5 tablespoons shortening
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1 egg yolk
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2 teaspoons distilled white vinegar
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3 cubes ice
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1/2 cup cold water