Slow Cooker Beef and Barley Stew with Mushrooms and Red Wine

Published November 14, 2026

This is the stew to put on when the weather turns cold and you want dinner to take care of itself. Beef chuck is seared in a hot pan until deeply browned, then slow-cooked all day with carrots, mushrooms, onion, tomato paste and red wine until the meat is so tender it falls apart with a fork. Pearl barley goes in only for the last hour, so it stays plump and chewy instead of turning to mush. The broth turns thick and rich on its own, with no cream and no flour paste needed. It is a beef main dish, not a soup: thick, hearty and filling, and best served in bowls with crusty bread for mopping up the broth.

Slow cooker beef and barley stew in a bowl with crusty bread

Ingredients

900 g beef chuck, cut into 4 cm chunks — chuck is the right cut here; it turns tender after hours of slow cooking, while lean cuts dry out
Salt and black pepper, to taste
2 tablespoons plain flour, for dusting the beef
2 tablespoons olive oil
1 onion, finely chopped
3 garlic cloves, minced
2 tablespoons tomato paste
180 ml dry red wine, such as Merlot or Côtes du Rhône — the wine adds depth; the alcohol cooks off during the long cooking time
750 ml beef stock
3 carrots, peeled and cut into thick rounds
250 g mushrooms, halved or quartered
2 bay leaves
1 teaspoon dried thyme
150 g pearl barley — add it only in the last hour, or it turns to mush
2 tablespoons chopped fresh parsley, to serve

Method

Season the beef chunks with salt and pepper and dust them lightly with flour. Heat the olive oil in a large pan over medium-high heat. Sear the beef in batches, without crowding the pan, for 3 to 4 minutes per side, until deeply browned all over. Do not skip the searing — the browned crust is where most of the stew’s flavour comes from. Move the seared beef into the slow cooker.
Turn the heat down to medium. Add the onion to the same pan and cook for 4 minutes, until soft. Stir in the garlic and tomato paste and cook for 1 minute, until the paste darkens slightly.
Pour in the red wine and scrape up the browned bits from the bottom of the pan with a wooden spoon. Simmer for 2 minutes, then pour the whole pan into the slow cooker.
Add the beef stock, carrots, mushrooms, bay leaves, and thyme to the slow cooker. Stir once, then put the lid on. Cook on low for 7 to 8 hours, or on high for 4 to 5 hours, until the beef is tender enough to fall apart with a fork. Keep the lid on and do not open the slow cooker to check it — every time you lift the lid, heat escapes and the cooking time stretches out.
One hour before serving, stir in the pearl barley. Put the lid back on and cook for 60 to 90 minutes more, until the barley is plump and chewy. Check the barley before serving — it should be tender but still have a bite.
Take out the bay leaves. Taste the stew and add salt and pepper if needed. If the broth is thinner than you like, take the lid off for the last 20 minutes so it reduces a little. Serve in deep bowls with chopped parsley on top and crusty bread on the side.

Common Mistakes, Substitutions, Serving and Storage

Common mistakes: adding the barley at the start, so it turns to mush; skipping the searing, so the stew tastes flat; opening the slow cooker lid again and again, so the beef stays tough; using a lean cut of beef, so the meat dries out.

Substitutions: use beef stewing steak instead of chuck; use a dark beer instead of red wine; use parsnips instead of one of the carrots; use farro instead of pearl barley, adding it at the same time.

Serving ideas: serve in deep bowls with crusty bread for mopping up the broth, or over mashed potatoes for an even heartier meal. A simple green salad on the side keeps the plate balanced.

Storage and reheating: refrigerate for up to 4 days — the stew tastes even better the next day. Reheat gently in a pot over low heat, adding a splash of stock if the barley has soaked up too much broth. Freeze for up to 3 months; thaw in the fridge overnight before reheating.

Frequently Asked Questions

Why add the barley only in the last hour? Barley cooks in about an hour. If it goes in at the start, it sits in hot liquid for 7 or 8 hours and turns to mush. Adding it last keeps it plump and chewy, and it thickens the broth just enough.

Why sear the beef first? Searing builds a deep brown crust on the meat, and that crust is where most of the stew’s rich flavour comes from. Beef that goes straight into the slow cooker without searing tastes flat and grey.

Why keep the lid on? A slow cooker needs steady, low heat to break down the tough fibres in beef chuck. Every time you lift the lid, a lot of heat escapes, the temperature drops, and the cooking time stretches out — so the beef can stay tough.

Can I cook this on high? Yes, on high for 4 to 5 hours the beef will get tender. Low and slow for 7 to 8 hours gives a richer flavour and more tender meat, so low is the better choice if you have the time.