INGREDIENTS
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1⁄4 cup butter
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3 cups quartered thinly-sliced onions
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1 1⁄2 cups water
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4 1⁄2 teaspoons instant chicken broth
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1⁄4 cup all-purpose flour
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1 3⁄4 cups milk
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1 1⁄2 cups shredded swiss cheese or 1 1⁄2 cups cheddar cheese, divided
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buttered crouton
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salt and pepper