We tried a beer brewed in a whiskey/bourbon barrel. Best beer ever, I’d rather drink bourbon anyway. Is the biggest difference between Jack Daniels and say Maker’s the type of wood or content of the mash.

The difference between bourbon like Maker’s Mark and Jack Daniels, a Tennessee whiskey, is that Jack is filtered through charcoal before aging, which adds another flavor. And yes, there are some wonderful bourbon-barrel beers out there. I’m not sure where you are, but Lexington (Ky.) Brewing and Distilling Co. makes a terrific Kentucky Bourbon Barrel Ale.