INGREDIENTS
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2 cups uncooked elbow macaroni
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4 tablespoons butter
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2 1 ⁄2 cups grated sharp cheddar cheese
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3 eggs
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1 ⁄2 cup sour cream
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1 10 3/4 ounce can condensed cheddar cheese soup
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1 ⁄2 teaspoon salt
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1 cup whole milk
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1 ⁄2 teaspoon dry mustard
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1 ⁄2 teaspoon black pepper