How long does it take to cook corned beef at 300 degrees?

Corned beef is typically boiled, but why not try baking this delicious cut of meat? Baked with Dijon mustard and brown sugar, this corned beef is slowly braised in the oven. We found this to be a delicious and unique taste. This was good both hot and cold, sliced for sandwiches, and finally, the leftover meat made it into potato salad.

How long does it take to cook corned beef at 300 degrees?

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Baked Corned Beef Brisket

Have you ever tried cooking corned beef in the oven? Slow cooking a brisket in the oven means you will have wonderfully tender corned beef. Corned beef is typically boiled, but why not try baking this delicious cut of meat? You can enjoy meat that is fork-tender when you bake the brisket in the oven.

Encrusted in Dijon mustard and brown sugar, this corned beef is slowly baked. We found this to be a delicious and unique taste. This was good both hot and cold, sliced for sandwiches, and finally, the leftover meat made it into potato salad. I know that you are going to love this corned beef recipe.

When you bake corned beef you are essentially making an oven braised brisket. The slow cooking breaks down the connecting tissue so the meat just turns into something wonderfully fork-tender.

Recipe Ingredients

You only need 3 simple ingredients for this incredible corned beef recipe:

  • Corned Beef Brisket
  • Dijon Mustard
  • Brown Sugar

That’s it! So add these to your shopping list and get ready to make the best tasting and most tender corned beef ever.

How do you pick out the perfect corned beef?

Corned beef is sold in three basic sizes, the whole brisket, the thick-cut, and the thin cut. Your choices really depend upon how many people you are serving.

The whole brisket is pretty self-explanatory. This is ideal for when serving a large group, it will serve 6 to 8 people.

The thick-cut is the point part of the brisket. It is the thicker piece of the brisket, has more fat in it, and it does have more flavor due to the fat content. The point or thick-cut is perfect for when you are serving about 4 to 6 people.

The thin cut of the brisket is also known as the flat. The flat portion has the least amount of fat. It is great for 2 to 4 people.

Why the brown sugar and dijon mustard?

Sometimes when you buy a commercially prepared corned beef brisket, the meat can be a bit salty. I always take the brisket out of the package and rinse it off in the sink, then I pat it dry with a paper towel.

Then I spread on the Dijon mustard and sprinkle on the brown sugar. As the beef cooks in the oven, the brown sugar and mustard slowly marinate and give the beef a lot of flavors.

How to Cook Corned Beef in the Oven

Cooking corned beef in the oven could not be simpler! Here are the recipe steps:

  1. Remove the corned beef from the package and rinse off the corned beef. Pat it dry with paper towels.
  2. Discard the seasoning package. Many corned beefs come with a seasoning package, you can discard this, it isn’t needed.
  3. Place the beef fat side up in the pan.
How long does it take to cook corned beef at 300 degrees?
  1. Spread the mustard on the beef.
How long does it take to cook corned beef at 300 degrees?
  1. Sprinkle brown sugar on top of the mustard.
How long does it take to cook corned beef at 300 degrees?
  1. Add water to the pan. Add enough water to fill 1/3 of the pan.
  2. Wrap the pan with foil.
  3. Bake at 375°F for 2 1/2 hours or until the internal temperature is 145°F.

For super tender corned beef, cook an additional hour or two. Corned beef is extremely tender when the internal temperature is 195°F.

How Long Should You Cook Corned Beef in the Oven?

Beef is fully cooked at 145 degrees, but at that temperature, it may not be tender as you would desire. My personal recommendation is to cook the beef for 3 to 4 hours.

I find corned beef to be fork tender when the internal temperature reaches 195 degrees. Consider using a meat thermometer to help you serve corned beef that is super tender.

Baked Corned Beef Encrusted in Dijon Mustard and Brown Sugar

We have all had boiled corned beef, you can even make corned beef in Instant Pot. An oven-baked corned beef will soon become a favorite of yours. You don’t need to serve corned beef for St. Patrick’s Day, you can serve this slow-roasted corned beef brisket all year long.

I hope you give this recipe a try soon!

How long does it take to cook corned beef at 300 degrees?

Looking for more Irish recipes? Try these!

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  • Instant Pot Irish Stew
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  • Irish Coffee
  • Shamrock Shake
  • Shepherds Pie

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Be sure to check out these restaurant copycat recipes and copycat seafood recipes.

How long does it take to cook corned beef at 300 degrees?

Baked Corned Beef with Mustard and Brown Sugar

Corned beef baked with brown sugar and Dijon mustard is a nice take on the traditional boiled corned beef. 

4.91 from 11 votes

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Course: Main Course

Cuisine: American

Keyword: Corned Beef

Prep Time: 10 minutes

Cook Time: 3 hours

Total Time: 3 hours 10 minutes

Servings: 10

Calories: 499kcal

Author: Stephanie Manley

Ingredients

  • 5 pounds corned beef
  • 1/2 cup Dijon mustard you can use more
  • 1/2 cup brown sugar

Instructions

  • Preheat the oven to 375 degrees F. Open the packaged corned beef and rinse well. Discard the seasoning packet. Place the corned beef fat side up on a large piece of foil (you will be wrapping the corned beef with the aluminum foil).  

  • Pat the brisket dry with a paper towel. After the brisket is patted dry, spread the mustard over the corned beef and sprinkle with the brown sugar.   Add enough water in the pan so the water is 1/2 inch deep. 

  •  Place the wrapped brisket in a roasting pan and place in the oven. Cook for about 2 1/2 hours. The internal temperature should be 145 degrees.  For super tender corned beef, cook an additional hour or two. Corned beef is extremely tender when the internal temperature is 195.

  • Open the top of the foil to expose the brisket and turn the oven to broil. Broil long enough for the mustard crust to brown

    How long to cook corned beef in oven at 300?

    Heat your oven to 300 degrees F. Rinse the corned beef and place in a shallow baking dish. Add enough water to cover the bottom of the pan with about 1/2 inch of water. Cover the pan with foil and place in the oven to bake for about 4 hours.

    What is the best temperature to cook corned beef to?

    Cook all raw corned beef to a minimum internal temperature of 145 °F as measured with a food thermometer before removing meat from the heat source. For safety and quality, allow meat to rest for at least three minutes before carving or consuming.

    How many minutes per pound do you cook a corned beef?

    Total cook time for corned beef to be fork-tender should be between 45 and 50 minutes per pound.

    How long does a 3 lb corned beef take to cook?

    For a two to three-pound corned beef brisket, cook for 2 1/2 to 3 hours. For a three to five-pound corned beef brisket, cook for 3 to 3 1/2 hours. STOVE: Place brisket fat-side up in a large pot and cover it with water. Bring the water to a boil; then reduce the heat and simmer, allowing about 1 hour per pound.