"Get this all-star, easy-to-follow Rainbow Ribbon Cake recipe from Sandra Lee..."
INGREDIENTS
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1 (18.25-ounce) box white cake mix (recommended: Betty Crocker)
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1 1/4 cups water
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1/3 cup canola oil (recommended: Wesson)
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3 egg whites
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1/2 teaspoon vanilla extract
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1 tablespoon each flavored gelatin: lemon, orange, cherry, grape, lime, and blue raspberry (recommended: Jell-O)
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2 cups boiling water
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2 (12-ounce) cans white whipped icing (recommended: Betty Crocker)
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Colored decorating icing: yellow, orange, red, purple, green, blue (recommended: Cake Mate)