INGREDIENTS
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3/4 cup butter, melted
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1 cup brown sugar
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1/2 cup sugar
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1 tsp vanilla
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1 egg
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1 egg yolk
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2 cup flour
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1/2 tsp baking soda
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1/4 tsp baking powder
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1/4 tsp salt
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2 cups milk chocolate chips (favorites are Ghirardelli, Guittard, Private Selection)