"No matter when I've made these soufflés, they have always been a success. Although I've never seen the centers start to fall, it's best to plan on serving them hot from the oven. —Jean Ference, Sherwood Park, Alberta..."
INGREDIENTS
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1/3 cup butter, cubed
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1/3 cup all-purpose flour
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2 cups whole milk
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1 teaspoon Dijon mustard
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1/4 teaspoon salt
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Dash hot pepper sauce
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1-1/2 cups shredded Swiss cheese
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1 cup shredded cheddar cheese
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1/4 cup shredded Parmesan cheese
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6 large eggs
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1/2 teaspoon cream of tartar