INGREDIENTS
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1 package 1-layer-size yellow cake mix
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2 tablespoons cooking oil
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3 8-ounce packages cream cheese, softened
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3/4 cup sugar
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1 teaspoon vanilla
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3 eggs
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1 8-ounce carton dairy sour cream
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3/4 cup whipping cream
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6 ounces semisweet chocolate, finely chopped
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2 tablespoons butter, softened