INGREDIENTS
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1 box white cake mix (Betty Crocker, Duncan Hines, etc.)
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1 cup all-purpose flour
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1 cup granulated white sugar
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3/4 teaspoon salt
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1 1/3 cups water
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2 tablespoons vegetable or canola oil
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1 teaspoon lemon extract
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1 cup sour cream
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4 large eggs
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9 cups powdered sugar
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3 cups butter (6 sticks), at room temperature (don't use margarine or shortening)
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3 teaspoons lemon extract
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3 to 6 tablespoons whipping cream
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a couple drops of lemon coloring, optional