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Home » Dinner » Oven Baked Corned Beef and Potatoes

Oven Baked Corned Beef and Potatoes

Created: February 12, 2020 Updated: February 7, 2022 by Lyuba Brooke 4 Comments

3.8K shares
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Tender, flavorful corned beef brisket cooked in the oven with mustard rub, onions, and baby gold potatoes. This is an easy dinner with simple ingredients and amazing results. The potatoes are so tender and flavorful from cooking together with the brisket, it’ll be your favorite way to eat potatoes.

If you like this recipe, make sure to try my 3-Ingredient Oven Baked Corned Beef, Instant Pot Corned Beef, and Reuben Sandwiches. 

short collage of corned beef in a plate

CORNED BEEF AND POTATOES

Don’t you get a little tired of the same old Corned Beef and Cabbage every single year? Sometimes I feel like people make it just because it’s St. Patrick’s Day and it’s an obligation. Personally, I love corned beef all year long and cooked many different ways. 

It helps that my husband keeps asking me when I’d be making my oven baked corned beef brisket every couple of weeks. Corned beef should have much more of a spotlight than just in March. It’s delicious beyond the traditional slow cooked way with cabbage and potatoes. I make so many different recipes with corned beef beyond the classics and of course, beyond my favorite Reuben sandwiches.  

In my attempts to find another way to cook corned beef in the oven, I stumbled on the best way of cooking potatoes. Of course, corned beef was there too and it was delicious. Potatoes truly amazed us though. Probably because we already know that corned beef would be delicious like always, but the potatoes came out incredible. 

I used baby gold potatoes so I could keep them whole because I knew that I wanted them to be extra tender. (When cut potatoes are cooked longer to be extra tender, they tend to crumble.) So after cooking corned beef for a couple of hours in the oven, I added potatoes right into all those juices that accumulated from corned beef. I let that cook for about an hour together and the results were outstanding. 

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pulling corned beef out of the pot with water

mustard rub

HOW TO MAKE CORNED BEEF IN THE OVEN

First, find a nice looking corned beef brisket that’s about 2.5 pounds. If you get a brisket that’s a little bigger or smaller, you will need to adjust the cooking time. 

Take corned beef out of the packaging and discard the seasoning packet that came with it. 

Corned beef straight from the packaging is pretty salty. What you can do to help get rid of some excess salt is bring it to boil in some plain water. To do that, place brisket in a pot of water and bring it to boil. As soon as it starts to boil, take the brisket out. This will remove some of the excess salt.

Preheat the oven to 350°. Tear off a couple of sheets of aluminum foil long enough to wrap the brisket and place them in a roasting pan, overlapping like a plus sign. Slice onions and spread them in the roasting pan, in the same shape as the brisket. 

Combine the ingredients for the mustard rub in a small bowl and rub boiled corned beef all over. Place the meat on top of the onions, fat cap up. Bring the aluminum foil together and close it, covering the brisket loosely, leaving a little space between the brisket and the foil. Place roasting pan into the preheated oven and cook for about an hour and a half.

Take the roasting pan out of the oven to add potatoes. Open the foil and nestle the potatoes all around the brisket in one even layer. Close the foil again but not too tight. Let everything cook for about 45 minutes. 

Open the foil and let it cook for another 15-20 minutes. You can turn on the broiler on low at the end and let the top crisp a little. 

Take corned beef brisket out of the pan and onto the cutting board. Tent with a sheet of foil and let it rest for about 10 minutes.

rubbed corned beef on top of onions

How Long To Cook Corned Beef In The Oven?

Calculate cooking time for the brisket to be about 60 minutes per pound. Cook corned beef brisket covered in aluminum foil but not too tight, leave some room between the brisket and the foil. 

For this recipe, the time is broken up for the addition of potatoes. Baby gold potatoes will need about an hour of total cook time, covered and uncovered. So if the corned beef brisket is 2 lbs, cook it by itself for an hour and then with potatoes for another hour. If the brisket is 3 lbs, cook it by itself for 2 hour and then with potatoes for another hour. 

adding potatoes to the roasting pan

MORE CORNED BEEF RECIPES TO TRY

Reuben Dip

Reuben Egg Rolls

Corned Beef Loaded Potatoes

Baked Corned Beef Sliders

pouring some juices over the beef

If you made any of my recipes and shared them on Instagram, make sure to tag me @willcookforsmiles and #willcookforsmiles so I can see all the things you tried!

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vertical view of the plate from the top

PIN THIS RECIPE

Oven Baked Corned Beef and Potatoes

Tender, flavorful corned beef brisket cooked in the oven with onions, baby gold potatoes, and mustard rub.
5 from 2 votes
Print Pin SaveSaved! Rate
Course: dinner, Main Course
Cuisine: American
Prep Time: 15 minutes minutes
Cook Time: 2 hours hours 40 minutes minutes
Total Time: 2 hours hours 55 minutes minutes
Servings: 4 (serves 4)
Calories: 789kcal
Author: Lyuba Brooke

Ingredients

  • 2.5 lb corned beef brisket
  • 1 large yellow onion (or 2 small yellow onions)
  • 2 lbs baby gold potatoes (can substitute fingerling potatoes)

Mustard Rub:

  • 4 garlic cloves pressed
  • 1 1/2 tbsp ground mustard
  • 1/2 tbsp ground coriander
  • 1/2 tbsp garlic powder
  • 2 tbsp canola oil or vegetables oil
US Customary - Metric

Instructions

Bring corned beef to boil:

  • Take corned beef out of the packaging and discard the seasoning packet that came with it. 
  • Place brisket in a pot of water and bring it to boil. As soon as it starts to boil, take the brisket out. This will remove some of the excess salt.

Cooking Corned Beef:

  • Preheat the oven to 350°. Tear off a couple of sheets of aluminum foil, long enough to wrap the brisket, and place them in a roasting pan, overlapping like a plus sign.
  • Slice onions and spread them in the roasting pan, the same shape as the brisket. 
  • Combine the ingredients for the mustard rub and mix them well to combine. Rub corned beef all over with the mixture.
  • Place meat on top of the onions, fat cap up. Bring aluminum foil together and close it, covering the brisket loosely, leaving a little space between the brisket and the foil.
  • Place roasting pan into the preheated oven and cook for about 1 1/2 hours.

Add Potatoes:

  • Take roasting pan out of the oven to add potatoes. Open the foil and nestle potatoes all around the brisket in one even layer so it cooks evenly.
  • Close the foil again but not too tight. Let everything cook for about 45 minutes. 
  • Open the foil and let it cook for another 15-20 minutes. You can turn on the broiler to low at the end and let the top crisp a little.
  • Take corned beef brisket out of the pan and onto the cutting board. Tent with a sheet of foil and let it rest for about 10 minutes.
  • Cut corned beef against the grain and serve with potatoes, onions, and some of the cooking juices.

Notes

All images and text ©Lyubov Brooke for ©Will Cook For Smiles. Please do not use my images without prior permission. If using my posts in collections and features, please link back to this post for the recipe. Disclaimer: Nutrition information shown is not guaranteed to be 100% accurate as most ingredients and brands have a slight variation.

Nutrition

Calories: 789kcal | Carbohydrates: 34g | Protein: 49g | Fat: 51g | Saturated Fat: 14g | Cholesterol: 153mg | Sodium: 3476mg | Potassium: 1862mg | Fiber: 7g | Sugar: 1g | Vitamin C: 105mg | Calcium: 111mg | Iron: 13mg
Tried this recipe?Mention @willcookforsmiles and tag #willcookforsmiles

long picture collage of ready beef and potatoes

LYUBA

ABOUT LYUBA

I’m Lyuba Brooke, mother of 2, the cook, recipe developer, photographer, and author behind willcookforsmiles.com. I share many classic and original recipes, cooking tips, and tutorials. My passion is sharing delicious meals for everyone to try. Read more...

3.8K shares

Filed Under: Beef, Dinner, St. Patrick's Day

All images and text ©Lyubov Brooke for ©Will Cook For Smiles. Please do not use my images without prior permission. If using my posts in collections and features, please link back to this post for the recipe. Disclaimer: Nutrition information shown is not guaranteed to be 100% accurate as most ingredients and brands have variations.

Comments

  1. C says

    March 29, 2023 at 9:08 pm

    5 stars
    Amazing 😋 I discarded the seasoning packet, rinse very well to lessen saltiness. I would not have CB any other way again!😋

    Reply
    • LyubaB says

      April 10, 2023 at 11:21 am

      I am so glad you liked it!

      Reply
  2. Liz Streithorst says

    December 11, 2022 at 2:55 pm

    5 stars
    I guess I shouldn’t rate it since I won’t make it until tomorrow. I took my corned beef our of freezer. I was saving it for when the craving came upon me. The craving has come. I read this recipe and could taste it in my mind’s taste buds. I can’t wait until tomorrow so I can taste it with my real taste buds.

    Reply
    • LyubaB says

      December 13, 2022 at 1:36 pm

      I hope you liked it!

      Reply

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Well, hey there!

I’m Lyuba Brooke, mother of 2, the cook, recipe developer, photographer, and author behind willcookforsmiles.com. I share many classic and original recipes, cooking tips, and tutorials. My passion is sharing delicious meals for everyone to try. Read More.

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