INGREDIENTS
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1/2 cup butter, cut into small chunks
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4 (1 ounce) squares unsweetened chocolate, chopped
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3 cups (18 ounces) semi-sweet chocolate morsels, divided as described in recipe
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1 1/2 cups all-purpose flour
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1/2 teaspoon baking powder
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1/2 teaspoon salt
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4 large eggs
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1 1/2 cups sugar
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2 teaspoons pure vanilla extract
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2 cups chopped pecans, toasted