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Corned Beef Roast

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  • Author: Lily Carter
  • Prep Time: 15 minutes
  • Cook Time: 8 hours (slow cooker) or 3-4 hours (oven)
  • Total Time: 8 hours 10 minutes
  • Yield: 4-8 servings (increased by 2-4 servings) 1x
  • Category: Main Course / Roast
  • Method: Oven
  • Cuisine: Irish, American
  • Diet: Gluten Free

Description

Corned Beef Roast is a savory, slow-cooked beef dish that’s beloved for its tender texture, crispy crust, and rich flavors. Traditionally enjoyed on St. Patrick’s Day, it’s a perfect dish for special occasions or cozy family dinners. The process of searing and slow-roasting ensures a juicy, flavorful roast with a satisfying depth of taste.


Ingredients

Units Scale
  • 3 to 4 lbs corned beef brisket (with spice packet)
  • 4 cups beef broth (or water)
  • 2 tablespoons whole grain mustard (or Dijon mustard)
  • 3 cloves garlic, minced
  • 1 onion, chopped
  • 3 large carrots, peeled and chopped (optional)
  • 1.5 lbs baby potatoes, halved (optional)
  • 1/2 head cabbage, chopped (optional)
  • 1 teaspoon black peppercorns (if spice packet is missing)
  • 1 teaspoon mustard seeds (if spice packet is missing)
  • 2 bay leaves (if spice packet is missing)
  • 3 whole cloves (if spice packet is missing)

Instructions

  1. Prepare the Meat – Rinse the corned beef under cold water and pat it dry with paper towels.
  2. Set Up the Cooking Liquid – Place the brisket in a slow cooker, Dutch oven, or roasting pan. Add beef broth (or water), garlic, and onion.

  3. Season the Meat – Rub the top with mustard and sprinkle the included spice packet. If missing, use black peppercorns, mustard seeds, bay leaves, and cloves.

  4. Cook Low and Slow

    • Slow Cooker: Low for 8-10 hours or high for 4-6 hours.

    • Oven: Cover and bake at 300°F (150°C) for 3-4 hours.

  5. Add Vegetables (Optional) – In the last 2 hours, add carrots and potatoes. Add cabbage in the last 30 minutes.

  6. Rest and Serve – Let the beef rest for 10-15 minutes, then slice against the grain for maximum tenderness.


Notes

  • Rinsing the corned beef reduces excess saltiness.
  • Cooking low and slow ensures fork-tender meat.
  • If the corned beef is tough, cook it longer.

Nutrition

  • Serving Size: 6 oz corned beef + veggies
  • Calories: 450
  • Sugar: 3g
  • Sodium: 1200mg
  • Fat: 30g
  • Saturated Fat: 10g
  • Unsaturated Fat: 18g
  • Trans Fat: 0g
  • Carbohydrates: 15g
  • Fiber: 3g
  • Protein: 32g
  • Cholesterol: 95mg