If you want to try their trick, choose the highest quality vinegar. It's not about its composition, as each type contains acid that enhances the meaty aroma. You can opt for apple cider vinegar ...
That would be Acetum, Costco's partner in producing authentic balsamic vinegar since 1999. It's based in Modena, Italy, and has been producing high-quality vinegar since 1906. Acetum, which means ...