The easiest, tastiest corned beef dinner is made right in your crock pot. This Slow Cooker Corned Beef recipe delivers tender, juicy meat every time. Finish it with a simple but bold sweet mustard glaze and a quick broil to concentrate the flavors before serving.
Savory, salty, sweet, and tangy—all at once. With cabbage, potatoes, and carrots cooked alongside the beef, this is a complete St. Patrick’s Day meal that’s effortless and satisfying.
I love corned beef and cabbage for St. Patrick’s Day, and this recipe keeps that classic spirit while improving the results in a few key ways. The core of the method is familiar—meat and sides in the slow cooker with the included pickling spice—but I focus on maximizing flavor, controlling salt, and ending with a glaze that gives a beautiful, caramelized finish.
Table of Contents
SO WHAT MAKES THIS CORNED BEEF THE BEST?
- It’s easy. Apart from a quick trip under the broiler at the end, your slow cooker does most of the work.
- Perfectly tender meat. Brisket is a tough cut with lots of connective tissue. Cooking it low and slow melts the collagen, keeping the meat moist and yielding fork-tender slices.
- Deep, balanced flavor. Using beer in the cooking liquid adds depth, and cooking potatoes and carrots with the beef lets them soak up that savory, lightly salty beef flavor.
- The glaze is the finishing touch. A sweet mustard glaze made from mustard, horseradish, butter, and brown sugar balances the saltiness and caramelizes under the broiler for an attractive, flavorful crust.
WHAT CORNED BEEF DO I BUY?
Choosing the right cut at the store sets you up for success. Common options are round roast, flat cut brisket, and point cut brisket. Avoid round roast when possible—it has little marbling and can be dry.
Choose flat cut or point cut brisket. Flat cut yields uniform slices and a neat presentation; point cut is often slightly more tender thanks to extra marbling. Make sure you buy pre-corned corned beef so you don’t need to pickle it yourself.
HOW TO PREPARE THE CORNED BEEF
- Rinse with cold water. Corned beef is very salty; rinsing removes excess surface salt and restores balance while leaving the characteristic flavor.
- Trim excess fat. Leave about 1/4″ of the fat cap. A very thick fat cap won’t fully render and will become an unpalatable chunk, so trim it down to keep moisture and flavor without wasting space in the slow cooker.
- Add liquids and vegetables. Place the brisket in the slow cooker fat-side up, sprinkle the seasoning packet over the meat, add potatoes and carrots around the beef, and cover with beer and water. Hold the cabbage for later so it doesn’t overcook.
- Cook low and slow. Cook on LOW until fork-tender, about 7–8 hours. Add the cabbage wedges for the final 2 hours of cooking so they stay tender but not mushy.
WHAT’S IN A SEASONING PACKET, AND CAN I MAKE MY OWN?
Most store-bought corned beef includes a seasoning packet. If yours doesn’t, or if you prefer to make your own, combine the basic spices below to mimic the packet.
Base spice mix:
- 3 bay leaves
- 16 whole black peppercorns
- 1 tablespoon mustard seeds
- 1 tablespoon coriander seeds
- ½ teaspoon crushed red pepper flakes
Optional additions for more complexity:
- 12 whole juniper berries
- 2 cardamom pods
- 8 allspice berries
- 8 whole cloves
- ½ teaspoon fennel seeds
- ½ teaspoon dill seeds
- 1 cinnamon stick, broken in half (remove before serving)
Use this mix just like the prepackaged seasoning. You’ll likely have leftovers—store them in an airtight container for the next batch.
CAN I MAKE THIS IN MY PRESSURE COOKER / INSTANT POT?
Yes. A few tips for the pressure-cooker method:
- Keep the same amounts of liquid. You need enough liquid to balance the saltiness and create a good cooking environment.
- Start without the vegetables. Cook the beef first, then add the vegetables afterward.
- Pressure-cooker timing: For a 3–4 pound corned beef, cook on high pressure for 85 minutes, then allow a 20-minute natural release. Remove the beef, strain the liquid to retain 1–1½ cups, add the potatoes, carrots, and cabbage, and cook on high pressure for 4 minutes with a quick release.
WATCH THE VIDEO
Slow Cooker Corned Beef with Sweet Mustard Glaze
5 from 7 reviews
- Author: Morgan
- Total Time: 9 hours 20 mins
- Yield: 4
Ingredients
- 1 (3 to 4 pound) ready-to-cook corned beef brisket with spice packet
- 1 (12 ounce) bottle beer
- 2 cups water
- 1 ½ pounds Yukon gold potatoes, quartered
- 4 large carrots, peeled and trimmed
- ½ small head green or savoy cabbage, outer leaves removed, cut into wedges
- 3 tablespoons melted butter
- 3 tablespoons brown sugar, lightly packed
- 2 tablespoons prepared horseradish
- 2 tablespoons Dijon mustard
Instructions
- Rinse the beef with cold water and pat dry with paper towels. Trim excess fat from the fat cap, leaving about ¼” of fat.
- Place the corned beef in the slow cooker fat-side up. Sprinkle the seasoning packet over the meat. Arrange the potatoes and carrots around the beef. Pour the beer and water into the slow cooker.
- Cover and cook on LOW for 7–8 hours, until the meat is fork-tender.
- Add the cabbage wedges on top of the beef and cook on LOW for another 2 hours, or until the vegetables are tender.
- Preheat the broiler to high. In a small bowl, stir together melted butter, brown sugar, horseradish, and Dijon mustard. Transfer the corned beef to a foil-lined sheet pan and brush the glaze over the top and sides. Broil until the glaze bubbles and caramelizes in spots, about 3–4 minutes—watch carefully to prevent burning.
- Let the corned beef rest for 5 minutes, then slice against the grain into ½-inch slices. Serve on a platter with the cooked vegetables.
- Prep Time: 20 mins
- Cook Time: 9 hours
