"This frosting recipe makes enough to frost a 9x13 cake very thickly, so use half of the recipe if you prefer less frosting. Make sure and use a premium root beer for better flavor!..."
INGREDIENTS
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1 package white cake mix (18.25 ounces)
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1 cup root beer
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1/4 cup water
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1/2 cup canola oil
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3 eggs
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1 tsp. root beer extract (McCormicks)
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4 cups powdered sugar
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1 package (8 ounces) cream cheese, softened
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1/2 cup (1 stick) butter, softened
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1 tsp. root beer extract (McCormicks)
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1 tsp. vanilla extract