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| salted butter: 1/4 cup |
| vegetable oil: 1 Tbl |
| onions (chopped): 1 1/2 cups (chopped) |
| garlic: 3 cloves (minced) |
| salt: 1 tsp |
| black pepper: 1 tsp |
| mustard powder: 1 Tbl |
| paprika: 1 Tbl |
| ground cumin: 1 tsp |
| cayenne pepper: 1 tsp |
| ketchup: 2 cups |
| dark brown sugar (packed): 1/4 cup |
| apple cider vinegar: 1/4 cup |
| water: 2 cups |