INGREDIENTS
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1/2 pound (1 cup) unsalted butter, softened at room temperature; more for the pan
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All-purpose flour for the pan
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12 ounces (3 cups) cake flour
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1 tablespoon plus 1 teaspoon baking powder
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3/4 teaspoon table salt
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1-3/4 cups granulated sugar
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Seeds scraped from 3/4 vanilla bean, or 2 teaspoons pure vanilla extract
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1 cup whole milk
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6 large egg whites, at room temperature
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1 pound mascarpone cheese, at room temperature
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2 cups heavy cream
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2/3 cup granulated sugar
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Seeds scraped from 1 vanilla bean, or 2 teaspoons pure vanilla extract
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Pinch table salt
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2 pints raspberries, rinsed and patted dry