We used the Porter Beer Malt Vinegar in making a really great beef marinade.
A 1/3 cup of Porter Beer Malt Vinegar mixed with 2/3 cup of Extra Virgin Olive Oil. Add 1/2 teaspoon of cumin, a 1/2 teaspoon of allspice, a 1/2 teaspoon of coriander, and 1/2 teaspoon of minced garlic. Whisk the marinade thoroughly. Put the beef (we used a Chuck Roast) in a large ziplock plastic bag, pour in the marinade, seal the plastic bag and refrigerate for at least eight hours.