INGREDIENTS
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3/4 cup water
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2 sticks (8 ounces) unsalted butter, plus more for the pan
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2 1/4 cups granulated sugar
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18 ounces semisweet chocolate, chopped
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3/4 teaspoon salt
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1 tablespoon vanilla extract
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3/4 teaspoon baking soda
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6 extra-large eggs (about 13 1/2 ounces total)
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2 cups (10 ounces) all-purpose flour
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12 ounces semisweet chocolate chips or chopped chocolate