Slow cooker corned beef brisket is our St. Patrick’s Day tradition. Every year, I pull out my crock pot, layer in the potatoes and carrots, and let the brisket cook low and slow while the house fills with that rich, savory smell that says celebration is coming.

Sliced corned beef brisket on a white plate with seasoned mustard seeds on top, surrounded by cooked potatoes, carrots, and cabbage. The plate rests on a green checkered cloth. this for later
Slow cooker corned beef brisket with cabbage, potatoes, and carrots is an easy crockpot recipe that always turns out tender and flavorful.
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I have learned over the years that meals do not need to be complicated to make people feel cared for. While it cooks, I can set the table, finish dessert, or just relax. No rushing.

By dinner, the brisket slices beautifully, the vegetables are tender, and everyone gathers around the table ready to eat. It is one of those meals that reminds me that hospitality does not have to be impressive. It just has to be open.

Ingredient Tips For Crockpot Corned Beef Brisket

Here’s a quick overview of the key ingredients for this recipe. For the full list of ingredients and exact measurements, be sure to check the recipe card at the bottom of this post.

A flat lay image of corned beef in packaging, with a nutrition label visible, surrounded by vegetables: a cabbage, several carrots, a yellow onion, and red potatoes. All items are on a green checkered cloth against a white background.
Ingredients for a dish displayed on a white surface: A spice packet, a can of beef broth, Worcestershire sauce in a small dish, caraway seeds, dry mustard, and garlic cloves. Each is labeled accordingly.
  • Corned beef brisket: Go for a cut with good marbling and try to get one with the spice packet included, as this adds great flavor. Point cut or flat cut brisket works perfectly fine for this recipe!
  • Onion and garlic: Yellow or white onions work best. You can use pre-minced or fresh garlic for this recipe!
  • Red potatoes: Small red potatoes hold their shape well. You can peel them for a smoother texture or leave the skin on for extra flavor.
  • Carrots: Grab large carrots and cut them into big chunks so they don’t turn to mush while cooking.
  • Worcestershire sauce: This adds a rich, savory kick to the broth. Don’t skip it!
  • Dry mustard: It adds a little tang that balances out the richness of the beef. If you don’t have it, Dijon mustard works too.
  • Seasoning packet (optional): If your corned beef comes with one, use it! It’s a great blend of spices that gives the dish its classic flavor.
  • Cabbage: A small head of cabbage is perfect. Cut it into wedges and add it toward the end so it stays tender but not mushy.
  • Caraway seeds: These add a slightly nutty, earthy flavor that pairs well with cabbage. If you’re not a fan, you can leave them out.
  • Beef broth: Use low sodium if you want to control the salt level.

Ingredient Variations and Substitutions

  • Mustard glaze: You can mix 2-3 tablespoons of mustard with 1 cup of brown sugar to make a sweet glaze to drizzle on top of the beef! This is optional, but it adds such a delicious flavor. 
  • Cabbage: If you’re not a fan of cabbage, you can leave it out of this recipe. 
  • Potatoes: This recipe uses red potatoes, but you could use russet or baby potatoes if you like. 
  • Carrots: Baby carrots can be substituted for the regular carrots in this recipe. 

How To Make This Crock Pot Corned Beef Recipe

Cooking corned beef brisket in the crockpot makes things easy!

Add Veggies and Meat to the Slow Cooker

Toss the onions, potatoes, and carrots at the bottom of the slow cooker so they can create a bed for the meat.

Then, lay the corned beef on top of the veggies so it cooks evenly and soaks up all the flavors.

Top view of a slow cooker containing red potatoes, carrots, and onion chunks. The vegetables are uncooked and arranged casually, ready for cooking. The slow cooker is white with green handles.
A raw beef roast sits in a white slow cooker surrounded by halved onions and whole carrots, ready for cooking.

Mix and Pour

Mix the broth with garlic, Worcestershire sauce, dry mustard, and the spice packet (if using). Pour it over everything, making sure the beef and veggies are coated!

A white bowl filled with a dark liquid marinade, containing herbs, spices, and peppercorns. A small metal whisk with a loop handle rests inside the bowl. The background is a plain white surface.
A slab of raw corned beef covered with mustard seeds is placed in a white slow cooker. Carrots and onions are partially visible beneath the beef, ready for slow cooking.

Cover and Cook

Cover and let the slow cooker do its job. The meat should be tender and easy to slice against the grain when it’s ready!

A slow cooker with corned beef, halved cabbage, whole red potatoes, and carrot pieces. The ingredients are seasoned with mustard seeds and spices. The cooker sits on a green and white checkered cloth.

Slow Cooker Corned Beef Brisket FAQs

How long does corned beef brisket take in the slow cooker?

Corned beef brisket takes 8 to 10 hours on low or 5 to 6 hours on high. Cooking it low and slow produces the best moist, tender texture.

Do you cook corned beef brisket fat side up or down?

Place the brisket fat side up in the slow cooker. As it cooks, the fat helps keep the meat moist and flavorful.

Should corned beef be submerged in liquid?

It does not need to be fully submerged. The steamy, covered environment of the slow cooker gently braises the brisket as it cooks.

Sliced corned beef with seasonings is served on a white plate, accompanied by whole red potatoes, cabbage wedges, and carrots. The plate rests on a green checkered cloth.
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St. Patrick’s Day Supper Menu for Family and Friends

Host a Saint Patrick’s Day Supper that leans into the relaxed, cozy vibe of the holiday without feeling over-the-top. Set the tone with simple touches like a green shamrock table runner, a few small jars of shamrocks, and cloth napkins tied with twine for a casual feel. Serve the slow cooker corned beef and cabbage family-style on a large platter so guests can help themselves, which keeps the mood easy and welcoming. Keep place settings simple with white dishes and maybe one fun accent, like green glasses or gold-toned flatware, for a subtle nod to the holiday. Add a basket of sliced beer bread on the table as the one extra touch that makes the meal feel complete and hearty. For a light dessert, serve Lemon Bars. For a signature detail, offer a small handwritten card at each seat with a lighthearted Irish blessing or a fun fact about the holiday to spark conversation.
St. Patrick’s Day might come once a year, but the heart behind this meal can show up any Tuesday night. A simple crock pot dinner, shared without pressure, can become something much bigger than a recipe. It can become a connection. It can become a ministry. It can become someone’s reminder that they are welcome.

Do you have a question about the recipe? Feel free to ask in the comments below. I’m here to help! If you enjoy making this recipe, be sure to let us know! Leave a comment with a star rating below. Also, snap a photo and tag @intentionalhospitality on Instagram.💛 I love seeing your creations!

A plate of sliced corned beef surrounded by boiled red potatoes, carrots, and wedges of cabbage, all arranged on a white plate. The meal is set on a green checkered cloth.
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Gina Dickson

Slow Cooker Corned Beef Brisket

Prep Time: 15 minutes
Cook Time: 8 hours
Total Time: 8 hours 15 minutes
Servings: 6 servings
Slow cooker corned beef brisket is the easiest way to make this classic meal. The brisket cooks low and slow with potatoes, carrots, and cabbage until perfectly tender and full of flavor. A simple crock pot dinner that is perfect for St. Patrick’s Day or a cozy family meal.
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Ingredients
 

  • 2 1/2 pounds corned beef brisket
  • 1 cup onion, quartered
  • 6 red potatoes, peeled and halved
  • 2 cups carrots, sliced in 2 inch long pieces
  • 1 clove garlic, minced
  • 1 tablespoon Worcestershire sauce
  • 1 teaspoon dry mustard
  • 1 spice packet, included with corned beef, optional
  • 1 cabbage, cut into wedges (small sized head)
  • 1 teaspoon caraway seeds
  • 2 cups beef broth

Instructions
 

Prepare the Brisket

  • Trim all visible fat from the corned beef brisket.
    2 1/2 pounds corned beef brisket

Prepare the Slow Cooker

  • Spray a large crockpot with nonstick cooking spray.
  • Place the onion, potatoes, and carrots in the bottom of the crockpot.
    1 cup onion, 6 red potatoes, 2 cups carrots
  • Lay the corned beef brisket on top of the vegetables.

Make the Cooking Liquid

  • In a small bowl, whisk together the spice packet , minced garlic, Worcestershire sauce, dry mustard, caraway seeds, and beef broth.
    1 clove garlic, 1 tablespoon Worcestershire sauce, 1 teaspoon dry mustard, 1 spice packet, 1 teaspoon caraway seeds, 2 cups beef broth
  • Pour the mixture over the corned beef in the crockpot.

Cook

  • Cover and cook on low for 8 hours or on high for 5-6 hours.
  • In the last hour of cooking, add the cabbage wedges to the crock pot.
    1 cabbage

Serve

  • Discard the cooking liquid.
  • Slice the corned beef against the grain for tenderness.
  • Serve with the cooked vegetables.

Gina’s Notes and Tips

Make-Ahead Tips: 
You can chop up the carrots, onions, and cabbage the night before and store them in the fridge (don’t cut the potatoes until right before to prevent browning). You can also mix up the broth and seasonings in a jar, so when it’s time to cook, all you have to do is dump everything in the slow cooker. If you’re making it a day in advance, cook it as usual, then store the beef and veggies in an airtight container with some of the broth to keep them from drying out. When you’re ready to serve, just reheat everything gently on the stove or in the slow cooker on low. 
Storage and Reheating Instructions:
Store leftover corned beef and veggies in an airtight container in the fridge for 3-4 days. When you’re ready to eat, reheat it in a pot on the stove over low heat or pop it in the microwave with a splash of broth to keep it from drying out. 

Equipment

Slow Cooker (6 Quart with Temp Probe)
Slow Cooker (6 Quart with Temp Probe)
Serving: 1serving, Calories: 601kcal, Carbohydrates: 50g, Protein: 35g, Fat: 29g, Saturated Fat: 9g, Polyunsaturated Fat: 1g, Monounsaturated Fat: 14g, Cholesterol: 102mg, Sodium: 2731mg, Potassium: 2038mg, Fiber: 9g, Sugar: 11g, Vitamin A: 7295IU, Vitamin C: 130mg, Calcium: 127mg, Iron: 6mg
Course: Dinner, Lunch
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A plate of sliced corned beef surrounded by potatoes, carrots, and cabbage wedges. The dish is on a wooden board with a green checkered cloth partially visible underneath.