"Made this for my SD's birthday. A huge hit. Oreos=Love!!..."
INGREDIENTS
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1 (18 1/2 ounce) box white cake mix
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1 1/4 cups water
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1/3 cup vegetable oil
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3 large egg whites
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1 cup coarsely crushed Oreo cookies (about 8)
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4 -4 1/2 cups powdered sugar
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1/2 cup shortening
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1/4 cup milk
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1 teaspoon vanilla extract