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| macaroni: 12 oz |
| salted butter: 7 Tbl |
| all-purpose flour (unsifted): 6 Tbl |
| nonfat milk: 3 cups |
| salt: 1 1/2 tsp |
| ground mustard: 1 tsp |
| black pepper: 1/4 tsp |
| garlic powder: 1/2 tsp |
| sharp cheddar cheese (shredded): 1 1/2 cups (shredded) |
| swiss cheese (shredded): 1 1/2 cups (shredded) |
Credit: Food.com