INGREDIENTS
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8 large egg yolks, plus 3 egg whites, room temperature
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2 large eggs
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1 cup plus 3 tablespoons, plus 1 teaspoon sugar
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1 tablespoon plus 1 teaspoon finely grated lemon zest, plus 2/3 cup fresh lemon juice (3 to 4 lemons total)
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2 tablespoons unsalted butter
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3/4 pound mascarpone cheese, room temperature
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1 pint blackberries