INGREDIENTS
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6 tablespoons unsalted butter, diced
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3 ounces unsweetened chocolate, chopped
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1 1/4 cups packed dark brown sugar (about 9 ounces)
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3 eggs, at room temperature
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3/4 cup flour
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1/4 teaspoon fine salt
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1/2 cup walnut pieces, toasted
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Biscotti Crumb Crust, recipe follows
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Walnut halves, optional
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Ice cream or sweetened whipped cream, optional
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One 5.5-ounce box biscotti (about 8), coarsely broken
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1/2 stick unsalted butter, chilled and diced
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1/4 cup packed dark brown sugar