INGREDIENTS
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1 1/2 cups (6.6 ounces) all-purpose flour
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1 1/4 cups (5.6 ounces) bread flour
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1 teaspoon baking soda
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1 teaspoon baking powder
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1 teaspoon fine sea salt
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2 sticks unsalted butter, at room temperature
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1/2 cup granulated sugar
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1 1/4 cups packed brown sugar
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2 teaspoons vanilla
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2 large eggs plus 1 egg yolk, at room temperature
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2 cups semi sweet chocolate chips