"A serrated knife makes fast work of finely chopping chocolate before melting...."
INGREDIENTS
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4 ounces semisweet or bittersweet chocolate, chopped
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4 tablespoons (1/2 stick) unsalted butter
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4 tablespoons sugar
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2 large eggs, yolks and whites separated
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1/2 teaspoon pure vanilla extract
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1/4 teaspoon salt
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Ice cream (any flavor), for serving (optional)