Slow Cooker Maple Mustard Corned Beef
127 CommentsUpdated Mar 12, 2026
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This easy Slow Cooker Maple Mustard Corned Beef combines ingredients that yield a delicious homemade mustard glaze and fork tender beef, which is perfect for a change of pace on St. Patrick’s Day (or any other day!).
For the last few years, I’ve made a standard Corned Beef and Cabbage meal. Though that meal turns out great, I really wanted to step this meal up a notch. The first thing I did differently was to ditch that pickling seasoning packet that comes with the corned beef and add totally different flavors.
Recipe Ingredients
- Corned Beef: For this recipe, I use a 3 lb. flat-cut corned beef roast. Remember to ditch the spice packet. If you are looking for a classic recipe, try my crockpot corned beef and cabbage.
- Cooking Oil: For searing the beef prior to slow cooking it.
- Maple Syrup – The star of the show! You can use pancake syrup (that’s what I use!) It really goes well with the salty corned beef.
- Yellow Mustard – This is standard yellow mustard, trust me it tastes great in this meal.
- Other Seasonings – Black pepper, and two minced garlic cloves, are all the other flavors needed for this tasty recipe.
- {The full recipe is in the recipe card below the images}
Variations
This recipe is wonderful as is, but if you want to make few tweaks, here are my top suggestions.
- Any cut of corned beef works well for this recipe. Use what is on sale, as it can get pricey.
- Instead of yellow table mustard, you can use Dijon mustard or whole-grain mustard.
- Carrots can be added to the crockpot as well, for they taste great with the sweet maple mustard sauce.
- You can replace the maple syrup for brown sugar.
Step-by-Step Directions
- Mix together the sauce ingredients. Set aside.
- Brown the corned beef on all sides. And add it to the slow cooker.
- Pour the maple-mustard mixture over the corned beef. Place the lid on the slow cooker.Cook for 7 hours on LOW.
- Serve and enjoy.
My Serving Suggestions
I still treat this meal as a special St. Patrick’s Day meal! Here are the sides that go great.
- Slow Cooker Colcannon Potatoes (pictured) these are mashed potatoes with cabbage and bacon!
- Mashed red potatoes are another of my go-tos! So easy to make on the stove top.
- Steamed Cabbage or try my bacon flavored Slow Cooker Cabbage.
- Sweet carrots are great side for this recipe, we often make slow cooker baby carrots.
My other favorite recipes for St. Patrick’s Day:
- Beer Bread pairs perfectly with hearty dishes like Guinness Corned Beef and Cabbage or Guinness Beef Stew, soaking up all those rich, savory flavors.
- If you’re in the mood for a deli-style meal, Slow Cooker Pastrami makes incredible Slow Cooker Reuben Sandwiches, especially with a side of Corned Beef and Cabbage Soup.
- Another recipe we make this time of year is Slow Cooker Corned Beef Hash—it’s great with an over-easy egg!
- If you can’t have red meat, try my Chicken Reuben Bake for all the classic flavors in casserole form.
Slow Cooker Maple Mustard Corned Beef
How to Video
Ingredients
- 3 lb. flat cut corned beef roast, ditch the spice packet
- 2 tsp. cooking oil
- ½ cup maple syrup
- ¼ cup yellow mustard
- ¼ tsp. black pepper
- 2 garlic cloves, minced
Instructions
- Rinse, then pat the corned beef dry with a paper towel.
- Set a large skillet on the stove top to medium-high heat. Add cooking oil to coat the bottom of the pan. When the oil is hot, brown the meat on all sides.
- Place the browned corned beef into the slow cooker.
- In a small bowl mix together the maple syrup, mustard, pepper, and garlic clove. Pour this sauce over the corned beef in the slow cooker.
- Cover and cook on LOW for 7 hours, without opening the lid during the cooking time.
- Serve with desired sides, I made mashed red potatoes, steamed carrots and cabbage.
Nutrition
Nutrition info is auto-generated. This information is an estimate; if you are on a special diet, please use your own calculations.
This was the best corned beef dinner I have ever made. Absolutely delicious!
This was the best corned beef I have ever made. I thought last year’s baked corned beef was good and easy, well my family has a new favorite
That was Maple mustard corned beef. It was so easy and tasty beyond belief. The biggest problem was making sure nobody opened the crockpot before the required 7 hours. I made it with the Irish Colcannon potatoes and baby carrots with fresh parsley and butter. First time nothing left. To bad the price of corned beef is so high this year or I would go buy more and make again.
Far side up or down
Either works. I always do down.
I have a 1.5 lb corned beef. Is it still 7 hours om high?
Cook it on low, for 6 hours.
Should we be adding water to the crockpot?
No, the sauce is the liquid for this recipe and the meat will make some juices too.
I have a 5.4 lb corn beef brisket, how long should I cook it in the slow cooker?
I would do 8 hours on low.
Can honey be used instead of maple syrup in this Recipe?
I’m unsure how the flavor would be without testing it.
Can you do this not in the slow cooker? Will the spices burn to easily if seared?
Corned beef is usually boiled or slow cooked. I’m unsure how it would be only being seared.
It’s not just seared. It’s slow cooked for 7 hours.
Someone asked how this would be not being slow cooked, only being seared.
Hi- this looks amazing- but wanted to double check- you dont need to add any extra liquid? If I were to add a can of beer would that totally ruin it? all the other recipes I found for slow cooker corned beef had some kind of liquid
I would only add a half can of beer if it was me so it won’t cover up all the other flavors.
Loved this recipe, was wondering what would happen if you cooked it for longer than 7 hours?
It would be more shredded. It should be fine!