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1/2 cup butter or margarine, softened
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1 cup (8 ounces) sour cream
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1 teaspoon vanilla extract
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2 medium ripe bananas, mashed (about 1 cup)
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1 package (8 ounces) cream cheese, softened
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1/2 cup butter or margarine, softened
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2 teaspoons vanilla extract
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3 3/4 to 4 cups confectioners' sugar
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