INGREDIENTS
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1 (2 sticks) unsalted butter, at room temperature
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1 c. light brown sugar, lightly packed
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1/2 c. granulated sugar
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2 large eggs
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1 tsp. vanilla extract
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2 c. all-purpose flour
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1 tsp. baking soda
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1 tsp. kosher salt
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8 oz. semisweet chocolate chips, chopped into small chunks
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2/3 c. chopped walnuts (optional)
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Flaked sea salt, such as Maldon
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Vanilla ice cream, for serving