Combine Ingredients: In a small saucepan, combine all the ingredients — apple cider vinegar, ketchup, water, Worcestershire sauce, soy sauce, brown sugar, ground mustard, salt, pepper, garlic powder, and onion powder.
Simmer the Sauce: Heat the saucepan over medium heat. Bring the mixture to a gentle simmer while stirring occasionally. Allow it to cook for about 10-15 minutes, or until the sauce thickens slightly.
Taste and Adjust: Taste the sauce and adjust the seasoning, adding more sugar for sweetness or vinegar for tanginess, depending on your preference.
Cool and Store: Once the sauce has thickened to your desired consistency, remove it from the heat and let it cool.
Serve: Pour the sauce over freshly cooked steak, or serve it on the side for dipping.