INGREDIENTS
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Vegetable oil cooking spray
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8 plain or almond biscotti, broken into 1-inch pieces (5 to 6 ounces)
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5 tablespoons unsalted butter, chopped into 1/2-inch pieces, chilled
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1/4 cup unsweetened cocoa powder
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1/4 packed cup dark brown sugar
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1/2 cup raspberry jam or preserves, such as Bonne Maman
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1/2 cup semisweet chocolate chips, such as Ghirardelli
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1 cup mascarpone, at room temperature (8 ounces)
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1 cup sour cream, at room temperature (8 ounces)
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5 large eggs, at room temperature
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1/2 cup granulated sugar
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1 1/2 teaspoons pure vanilla extract
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Special equipment: One 7-by-10 3/4-inch nonstick metal baking pan