INGREDIENTS
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7 tablespoons unsalted butter
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1/2 cup sugar
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1/3 cup packed dark brown sugar
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1 large egg
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1 large egg yolk
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1 teaspoon vanilla extract
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1 cup flour
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1/2 teaspoon baking soda
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1/2 teaspoon kosher salt
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7oz semi-sweet chocolate, chopped into 1/4" chunks