INGREDIENTS
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8 ounces (2 sticks) unsalted butter
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3/4 cup granulated sugar
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3/4 cup firmly-packed light brown sugar
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2 large eggs
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2 teaspoons vanilla extract
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2 cups all-purpose flour (scooped and leveled)
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1 teaspoon salt
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1 teaspoon baking powder
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4 ounces chopped walnuts, pecans, or almonds (about 1 cup)
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5 ounces bittersweet chocolate, roughly chopped to pieces
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5 ounces milk chocolate, roughly chopped to pieces
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5 ounces white chocolate, roughly chopped to pieces