INGREDIENTS
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12 ounces fine-quality bittersweet chocolate (not unsweetened), chopped
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1/2 stick (1/4 cup) unsalted butter, cut into pieces
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1/4 cup heavy cream
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1 tablespoon instant espresso powder dissolved in 1 tablespoon boiling water
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2 tablespoons Sambuca or other anise liqueur
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about 1 cup unsweetened cocoa powder for coating truffles