I use Glutenberg Stout in this recipe. Glutenberg is an entirely gluten-free brewery in Montréal, Quebec. Their stout is available in the LCBO (Ontario) for a limited time (as of February 2022). If you're in the US, check out this list of gluten-free stouts. I don't recommend using another style of gluten-free beer other than a stout. Substitute red wine or more beef stock if you cannot find gluten-free stout.