INGREDIENTS
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1 lb unsalted butter
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1 3/4 c sugar
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2 1/4 c packed light brown sugar
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4 large eggs
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3 c plus 2 tbsp pastry flour
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3 c bread flour
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1 tble salt
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2 tsp baking powder
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2 tsp baking soda
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1 tbls vanilla
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2 lb bittersweet chocolate, coursley chopped