INGREDIENTS
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4 tablespoons unsalted butter, at room temperature
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1 cup granulated sugar
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1/2 tablespoon fine lemon zest
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3 large eggs, at room temperature, separated
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1/3 cup lemon juice
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1/3 cup all-purpose flour
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1 cup sour cream
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1/4 teaspoon salt
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Powdered sugar,for dusting
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Strawberries or any berry you like for garnish