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| salted butter: 1/4 cup |
| white mushrooms: 0.5 lb (diced) |
| onions - yellow (chopped): 1/4 cup (minced) |
| all-purpose flour (unsifted): 1/4 cup |
| mustard powder: 1/2 tsp |
| dried beef: 0.25 lb (slivered) |
| half and half cream: 1 cup |
| 2% milk: 1 cup |
| lemon juice: 1/2 tsp |
Credit: Food.com