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| ground beef: 1 lb |
| ground pork: 1 lb |
| bread crumbs: 3/4 cup |
| 2% milk: 1/2 cup |
| eggs: 2 (beaten) |
| salt: 1 1/2 tsp |
| black pepper: 1/2 tsp |
| sweet onions (chopped): 1/2 cup |
| light brown sugar (packed): 1/2 cup |
| ketchup: 1/2 cup |
| yellow mustard: 1/4 cup |
| apple cider vinegar: 2 Tbl |
Credit: Food.com