Slow cooker corned beef is the easiest way to make tender, sliceable corned beef and cabbage: a brisket rubbed with its spice packet rests on onion, garlic, carrots and potatoes, cooks all day in beef broth with a splash of cider vinegar and a little brown sugar, and gets cabbage wedges for the last hour. It takes 15 minutes to prep and serves 6.
How to make it: Layer the vegetables in the slow cooker, set the brisket on top fat side up and sprinkle it with the spice packet. Pour in the broth, vinegar and brown sugar. Cook on LOW for 8 to 9 hours or HIGH for 4 to 5, adding the cabbage about an hour before the end. Rest the beef, then slice it against the grain.
Why You’ll Love It
- Fork-tender beef: hours of gentle heat break down the tough brisket.
- Whole meal in one pot: beef, potatoes, carrots and cabbage cook together.
- 15 minutes of prep: layer it in the morning and dinner is ready at night.
- Perfect for St. Patrick’s Day: and for Reuben sandwiches with the leftovers.
Ingredient Notes
Corned beef brisket: 3 to 4 pounds, with its spice packet. Flat cut slices neatly; point cut is fattier and more tender.
Vegetables: 1 quartered onion, 3 to 4 smashed garlic cloves, 3 to 4 carrots in chunks, 3 to 4 Yukon gold or red potatoes, and half a head of green cabbage in wedges.
Liquid: 3 cups beef broth or water.
Optional balance: 2 tablespoons apple cider vinegar and 1 tablespoon brown sugar take the edge off the saltiness.
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Ingredients
- 3-4 lb corned beef brisket
- 1 onion, quartered
- 3-4 cloves garlic, smashed
- 3-4 carrots, peeled and cut into chunks
- 3-4 potatoes (Yukon gold or red), halved or quartered
- 1/2 head green cabbage, cut into wedges
- 3 cups beef broth (or water)
- 2 tbsp apple cider vinegar (optional)
- 1 tbsp brown sugar (optional)
- 1 spice packet (included with the corned beef)
How to Make Slow Cooker Corned Beef
1. Layer the vegetables. Start by layering the onion, garlic, carrots, and potatoes evenly across the bottom of your slow cooker.
2. Add the beef. If you prefer a less salty flavor, quickly rinse the corned beef under cold water. Place it on top of the vegetables with the fat side facing up.
3. Season. Sprinkle the included spice packet over the brisket so it’s evenly coated.
4. Add the liquid. Pour in the beef broth, then add the apple cider vinegar and brown sugar if using to balance the flavors.
5. Slow cook. Cover and cook on LOW for 8–9 hours (recommended) or HIGH for 4–5 hours, until the beef is fork-tender. It will be well past the 145°F safe minimum by then.
6. Add the cabbage. About 1 hour before it’s done, add the cabbage wedges on top or around the meat so they soften but don’t overcook.
7. Rest and slice. Remove the brisket and let it rest for 10–15 minutes. Slice against the grain for the most tender bites.
8. Serve. Serve with the vegetables and spoon some of the rich cooking juices over everything for extra flavor.
9. Glaze (optional). For a caramelized finish, brush the cooked brisket with a mix of honey, Dijon mustard, and brown sugar, then broil for 3–5 minutes until glossy and slightly crisp on top.
Is It Better to Cook Corned Beef on Low or High?
Low. Eight to nine hours on LOW gives the connective tissue in the brisket time to melt, so the meat turns tender without drying out. HIGH works in about half the time, but the meat can come out firmer and stringier. If you’re home all day, LOW is worth the wait.
Does Corned Beef Need to Be in Liquid?
Yes, partly. The broth keeps the slow cooker moist and the beef from drying out, and the vegetables underneath cook in it. The brisket doesn’t need to be fully submerged, since the lid traps the steam, but it should sit in a good amount of liquid. Fat side up lets the fat baste the meat as it renders.
The Secret to the Best Corned Beef
- Cook it low and slow. Patience is what makes it tender.
- Rinse it if you like it less salty. A quick rinse removes surface brine.
- Add the cabbage late. An hour is enough; longer turns it mushy.
- Rest before slicing. Ten to fifteen minutes keeps the juices in.
- Slice against the grain. Look for the lines in the meat and cut across them.
Variations
- Beer: replace some of the broth with a dark beer.
- Honey mustard glaze: brush and broil for a sticky crust.
- Parsnips or turnips: add them with the carrots.
- Baby potatoes: leave them whole.
- No spice packet: use pickling spice, black peppercorns and a bay leaf.
Storage & Leftovers
Refrigerate leftovers within 2 hours and eat them within 3 to 4 days. Store the beef in some of the cooking liquid so it stays moist. Leftovers make great Reuben sandwiches, corned beef hash or a Reuben crescent bake.
What to Serve With It
Serve it with the potatoes, carrots and cabbage from the pot, plus grainy mustard, horseradish and Irish soda bread or rye.
More slow cooker beef: slow cooker 4-ingredient onion beef brisket, slow cooker dark beer beef roast, melt in your mouth beef tips with mushroom gravy and slow cooker Amish beef and noodles. For another Irish-style dinner, try Irish bacon, cabbage and potato soup.
Frequently Asked Questions
What is the best method to cook corned beef in a slow cooker?
Set it fat side up on vegetables with broth and the spice packet, cook on LOW for 8 to 9 hours and add cabbage for the last hour.
Does corned beef need to be in liquid in a slow cooker?
It should sit in liquid, but it doesn’t need to be fully covered.
Is it better to cook corned beef on low or high in a crockpot?
Low gives the most tender result.
What is the secret to the best corned beef?
Long, slow cooking, a rest before slicing and cutting against the grain.
Should I rinse corned beef?
Rinse it if you prefer it less salty.
How long do leftovers keep?
3 to 4 days in the refrigerator.
Final Notes
Cook it low, add the cabbage late and slice against the grain. If you try it with beer or the honey mustard glaze, tell me in the comments how it turned out.
Slow Cooker Corned Beef Brisket
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Ingredients
- 3-4 lb corned beef brisket with spice packet
- 1 onion quartered
- 3-4 cloves garlic smashed
- 3-4 carrots peeled and cut into chunks
- 3-4 potatoes Yukon gold or red, halved or quartered
- 1/2 head green cabbage cut into wedges
- 3 cups beef broth or water
- 2 tbsp apple cider vinegar optional
- 1 tbsp brown sugar optional
- 1 packet spice packet included with corned beef
Instructions
- Start by layering the onion, garlic, carrots, and potatoes evenly across the bottom of your slow cooker.
- If you prefer a less salty flavor, quickly rinse the corned beef under cold water. Place it on top of the vegetables with the fat side facing up.
- Sprinkle the included spice packet over the brisket so it’s evenly coated.
- Pour in the beef broth, then add the apple cider vinegar and brown sugar if using to balance the flavors.
- Cover and cook on LOW for 8–9 hours (recommended) or HIGH for 4–5 hours, until the beef is fork-tender. It will be well past the 145°F safe minimum by then.
- About 1 hour before it’s done, add the cabbage wedges on top or around the meat so they soften but don’t overcook.
- Remove the brisket and let it rest for 10–15 minutes. Slice against the grain for the most tender bites.
- Serve with the vegetables and spoon some of the rich cooking juices over everything for extra flavor.
- Optional: For a caramelized finish, brush the cooked brisket with a mix of honey, Dijon mustard, and brown sugar, then broil for 3–5 minutes until glossy and slightly crisp on top.
Notes
Nutrition
Nutrition values are estimates based on the listed ingredients and serving count. Actual values vary with brands, cuts and portion sizes.
