INGREDIENTS
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2 teaspoons lightly salted butter, softened
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1 teaspoon unsweetened cocoa
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10 ounces bittersweet chocolate, broken into 1-inch pieces
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1 stick (4 ounces) lightly salted butter, cut into 1-inch pieces
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6 whole eggs
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1 cup sugar, divided
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2 teaspoons rum
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1 teaspoon pure vanilla extract
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For the garnish:
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1 teaspoon confectioners’ sugar, for dusting
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Vanilla ice cream and/or fresh raspberries, for serving