INGREDIENTS
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3/4 cup of butter [regular/salted] softened
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3/4 cup brown sugar [light or dark]
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1/4 cup granulated sugar
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1 large egg
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2 tsp pure vanilla extract
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2 cups unbleached all-purpose flour
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2 tsp cornstarch
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1 tsp baking soda
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1/4 tsp salt
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3/4 cup dark chocolate chips [or bittersweet]