Slow-Roasted Corned Beef Brisket with Vegetables

Prep: 15 minCook: 6 hr8 servingsmediumBritish
Slow-Roasted Corned Beef Brisket with Vegetables

A hearty one-pot meal featuring tender corned beef brisket slow-roasted with potatoes, carrots, and aromatic vegetables. The long, low-temperature cooking transforms the tough brisket into fork-tender meat while the vegetables absorb the savory flavors. Perfect for St. Patrick's Day celebrations or any time you want a comforting family dinner that requires minimal hands-on work. The included spice packet provides traditional corned beef seasoning, while the gentle roasting method ensures incredibly tender results.

Ingredients

8 servings
  • 5 ½ pound corned beef brisket with spice packet
  • 7 small potatoes, peeled and diced
    sweet potatoes1:1gluten-free

    sweet flavor variation

    Full guide →
  • 4 medium carrots, peeled and diced
    parsnips1:1gluten-free

    earthier flavor

    Full guide →
  • 1 medium onion, diced
  • 3 cloves garlic, chopped
  • water
    beef broth1:1gluten-free

    richer flavor

    Full guide →

Instructions

  1. 1

    Preheat oven to 300 degrees F

  2. 2

    Place corned beef brisket in center of roasting pan

  3. 3

    Arrange potatoes and carrots around the sides

  4. 4

    Scatter onion and garlic over top

  5. 5

    Sprinkle seasoning packet over beef

  6. 6

    Pour in water until potatoes are almost covered

  7. 7

    Cover with lid or heavy aluminum foil

  8. 8

    Roast until corned beef can be flaked apart with a fork

Tips

Tip 1

Check doneness by testing with a fork - the meat should flake apart easily when properly cooked.

Tip 2

Keep the pan tightly covered throughout cooking to prevent moisture loss and ensure even cooking.

Tip 3

Let the roast rest for 10-15 minutes before slicing to allow juices to redistribute.

Good to Know

Storage

Refrigerate leftovers for up to 4 days in airtight containers.

Make Ahead

Can be prepared 1 day ahead and reheated gently in oven.

Serve With

Slice against the grain and serve with the roasted vegetables and cooking juices.

See pairing guide →

Common Mistakes

Watch

Don't rush the cooking time to avoid tough, chewy meat.

Watch

Keep pan covered to prevent drying out during long cooking.

Watch

Don't slice too thick or the meat will be difficult to chew.

Substitutions

potatoes
sweet potatoes1:1gluten-free

sweet flavor variation

Full guide →
carrots
parsnips1:1gluten-free

earthier flavor

Full guide →
water
beef broth1:1gluten-free

richer flavor

Full guide →
Find more substitutions →

FAQ

Can I cook this in a slow cooker instead?

Yes, cook on low for 8-10 hours or high for 4-5 hours with same ingredients and liquid levels.

What if I don't have a spice packet?

Mix 2 tablespoons pickling spice, 1 tablespoon salt, 1 teaspoon black pepper, and 1 bay leaf as substitute.

How long will leftovers keep in the refrigerator?

Properly stored leftover corned beef will keep for 3-4 days in the refrigerator in airtight containers.