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Corned Beef Roast – Tender, Savory, and Comforting

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This oven-roasted corned beef brisket is tender, juicy, and packed with bold spice flavor. Finished with a tangy-sweet mustard glaze, it’s perfect for holidays or hearty dinners.

Ingredients

Scale
  • 34 lb corned beef brisket (with spice packet)

  • 2 tbsp Dijon mustard

  • 2 tbsp brown sugar

  • 1 cup low-sodium beef broth or water

  • Optional: 4 garlic cloves, 1 sliced onion

Instructions

  • Preheat oven to 300°F (150°C).

  • Rinse brisket and pat dry. Place in a roasting pan, fat-side up.

  • Mix mustard and brown sugar into a paste. Rub over brisket.

  • Sprinkle spice packet over the top.

  • Pour broth into the pan. Add garlic and onion if using.

  • Cover tightly with foil or a lid. Roast for 3½ to 4 hours.

  • Uncover and roast 30 minutes more to brown the top.

  • Rest 10–15 minutes. Slice against the grain and serve.

Notes

  • For a sweeter crust, increase brown sugar to 3 tbsp.

  • Store leftovers refrigerated up to 4 days.

  • Serve with cabbage, carrots, or roasted potatoes.