INGREDIENTS
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½ cup (1 stick) of unsalted butter, at room temperature
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½ cup granulated sugar
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½ cup packed brown sugar
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1 large egg
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1 teaspoon vanilla extract
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1¼ cups all-purpose flour
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½ teaspoon baking soda
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¼ teaspoon salt
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1 cup dark chocolate chips
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1 cup roasted hazelnuts, half coarsely chopped and half finely chopped
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sea salt