Go Back Email Link
–+ servings
Mustard rubbed sliced on a plate
Print Recipe
4.82 from 27 votes

Slow Roasted Corned Beef with Mustard Rub

Celebrate St. Patrick's Day in style with mustard-rubbed slow-roasted corned beef. Delicious, juicy beef, zesty mustard, and aromatic spices
Prep Time5 minutes
Cook Time4 hours 5 minutes
Total Time4 hours 10 minutes
Course: Dinner, holiday meal, Main Course
Cuisine: American, British, Irish
Keyword: Beef, comfort food, festive, slow-roasted
Servings: 8 Servings
Calories: 466kcal
Author: Belly Laugh Living

Equipment

Ingredients

  • 4 Pounds Corned Beef Brisket (makes enough for a 3 - 5 pound Corned Beef Brisket)
  • 1 Large Onion
  • ⅓ Cup Dijon Mustard
  • 1 teaspoon Black Pepper
  • 1 teaspoon Onion Powder
  • 1 teaspoon Garlic Powder
  • 1 teaspoon Thyme
  • Spice packet included with the Corned Beef

Instructions

  • Preheat the oven to 350°. Bring water to a boil in a large stock pot. Place the corned beef in the boiling water. Boil for four minutes.
    Corned beef in boiling water
  • Remove the corned beef from the water. Let cool for 3 or 4 minutes.
    4 Pounds Corned Beef Brisket
    Corned Beef on a cutting board
  • Put enough foil in a casserole dish to wrap around the corned beef.
    Foil lined casserole dish
  • Slice onions and place on the foil in the casserole dish
    1 Large Onion
    Sliced onions on foil
  • Mix together the mustard, thyme, onion powder, garlic powder, and the contents of the seasoning packet included with the corned beef package.
    ⅓ Cup Dijon Mustard, 1 teaspoon Black Pepper, 1 teaspoon Garlic Powder, 1 teaspoon Thyme, 1 teaspoon Onion Powder
    Mustard sauce in a bowl
  • Rub mustard mixture over the corned beef.
    Spreading mustard on corned beef
  • Place corned beef on top of the sliced onions.
    Corned beef with mustard sauce in foil
  • Wrap foil around the corned beef in foil to seal. Bake for 4 to 4 ½ hours in a 350-degree oven.
    Corned beef wrapped in foil
  • Let cool for a few minutes. Slice!!!
    sliced Corned Beef
  • Enjoy!! Make sure to check out some of our recipes for using the corned beef.
    Sliced corned beef on a plate

Nutrition

Calories: 466kcal | Carbohydrates: 3g | Protein: 34g | Fat: 34g | Saturated Fat: 11g | Cholesterol: 122mg | Sodium: 2868mg | Potassium: 718mg | Fiber: 1g | Sugar: 1g | Vitamin A: 20IU | Vitamin C: 63.2mg | Calcium: 26mg | Iron: 4.1mg