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| macaroni: 0.75 lb |
| salted butter: 1/3 cup |
| all-purpose flour (unsifted): 1/3 cup |
| mustard powder: 1 tsp |
| onion powder: 1 tsp |
| 2% milk: 3 1/2 cups |
| worcestershire sauce: 2 Tbl |
| sharp cheddar cheese (shredded): 1 1/2 cups |
| swiss cheese (shredded): 1 1/2 cups |
| bread crumbs: 1/3 cup |
Credit: Food.com