INGREDIENTS
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3 1/2 cups sifted cake flour
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1/2 teaspoon salt
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1 1/2 cups (3 sticks) butter, at room temperature
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Finely grated zest of 2 large lemons
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2 teaspoons pure lemon extract
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2 2/3 cups sugar
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6 large eggs
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1 cup sour cream
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1/3 cup fresh lemon juice
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1/2 c sugar