Can I make this in a slow cooker?
Yes. Sear the beef and sauté aromatics on the stovetop, then transfer to a slow cooker with Guinness and broth. Cook on low 6–8 hours until beef is fork-tender.
What's the difference between colcannon and regular mashed potatoes?
Colcannon is mashed potatoes folded with sautéed cabbage, leeks, butter, and milk, giving it a creamy texture and subtle vegetable flavor. Regular mashed potatoes are just potatoes, butter, and cream.
Can I substitute the Guinness?
You can use another dark stout or porter beer, or replace half the Guinness with beef broth to reduce alcohol content. The flavor will be less rich and complex.
How do I know when the beef is done?
The beef should be fork-tender and easily break apart after braising. It typically takes 2–3 hours on the stovetop at a gentle simmer, or 6–8 hours on low in a slow cooker.
Can I make this ahead?
Yes. The stew tastes even better the next day as flavors meld. Refrigerate in an airtight container up to 4 days, or freeze up to 3 months. Reheat gently on the stovetop.