Pour the apple cider vinegar, water, ketchup, and Worcestershire sauce into a medium saucepan. Stir everything together until the ingredients are well blended and smooth.

Add brown sugar, paprika, garlic powder, onion powder, black pepper, salt, and cayenne pepper. Whisk thoroughly so the spices spread evenly throughout the liquid mixture.

Place the butter into the saucepan. It adds richness and helps balance the tangy vinegar flavor while creating a smoother texture.

Place the saucepan over medium heat. Stir frequently as the mixture warms. This prevents ingredients from sticking and ensures even heating.

Allow the sauce to reach a gentle simmer. Avoid a strong boil. Slow cooking helps the seasonings blend together properly.

Let the sauce simmer for about ten minutes. Stir occasionally during cooking. This develops the flavor and allows the spices to fully bloom.

Taste the sauce carefully. Add more brown sugar if you prefer sweetness. Add extra vinegar if you enjoy a stronger tangy flavor.

Remove the saucepan from the heat. Allow the sauce to cool slightly before transferring it to a storage jar or container.

Brush the sauce onto meat every thirty to forty-five minutes during smoking or grilling. This keeps the meat moist and flavorful throughout cooking.