Classic beef stew is good, but this sophisticated beef stew — enriched with beer, cocoa powder and espresso — is really something special. Start by browning the beef and making a quick roux to guarantee a thick, flavorful stew instead of a watery, bland soup, and finish with hit of balsamic vinegar and lemon juice to balance out the rich, round notes. Dried shiitake mushrooms provide another layer of complexity, but if you can’t find them, leave them out. The stew will still be delicious…