Irish Roast Beef with Guinness au Jus


This tender and robustly flavored Irish roast beef is marinated in Guinness beer, slathered with garlic and herbs, and cooked low and slow in the oven. The au jus made with the leftover roast juices is the icing on the cake.

Prep Time:
20 mins
Cook Time:
3 hrs 15 mins
Additional Time:
20 hrs
Total Time:
23 hrs 35 mins


  • 1 (2 pound) boneless beef chuck roast

  • 1 (12 fluid ounce) can or bottle Irish stout beer (e.g. Guinness®)

  • 1 tablespoon olive oil

  • ½ teaspoon dried rosemary

  • ½ teaspoon ground thyme

  • ½ teaspoon steak seasoning

  • ½ teaspoon ground black pepper

  • 4 cloves garlic, minced

  • 1 pound small round red potatoes

  • salt and ground black pepper to taste


  1. Place roast in a roasting pan and pour stout over top. Cover the pan with plastic wrap and marinate in the refrigerator, 8 hours to overnight, turning once.

  2. When ready to cook, preheat the oven to 250 degrees F (120 degrees C).

  3. Transfer roast to a cutting board and pat dry. Leave stout in the baking pan.

  4. Heat olive oil in a large skillet over medium-high heat. Sear roast for 2 to 3 minutes per side; transfer to a plate.

  5. Crush rosemary, thyme, steak seasoning, and pepper with a mortar and pestle. Add minced garlic and stir to make a paste. Spread paste over all sides of roast. Place roast back into the roasting pan with stout, and cover loosely with foil.

  6. Bake in the preheated oven for 2 hours. Add potatoes to the roasting pan and remove the foil. Continue to bake until an instant-read thermometer measures 145 degrees F (65 degrees C) for medium, about 1 more hour, or to desired degree of doneness. Remove from the oven, cover with a doubled sheet of aluminum foil, and allow to rest in a warm area for 20 minutes before slicing.

  7. While the roast is resting, pour pan juices into a pot. Bring to a boil over medium heat, then reduce the heat and simmer until juices have reduced and thickened, about 10 minutes. Season to taste with salt and pepper. Strain and serve with beef and potatoes.

Nutrition Facts (per serving)

369 Calories
25g Fat
12g Carbs
21g Protein
Nutrition Facts
Servings Per Recipe 8
Calories 369
% Daily Value *
Total Fat 25g 32%
Saturated Fat 10g 48%
Cholesterol 82mg 27%
Sodium 138mg 6%
Total Carbohydrate 12g 4%
Dietary Fiber 1g 5%
Protein 21g
Vitamin C 12mg 59%
Calcium 25mg 2%
Iron 3mg 16%
Potassium 553mg 12%

* Percent Daily Values are based on a 2,000 calorie diet. Your daily values may be higher or lower depending on your calorie needs.

** Nutrient information is not available for all ingredients. Amount is based on available nutrient data.

(-) Information is not currently available for this nutrient. If you are following a medically restrictive diet, please consult your doctor or registered dietitian before preparing this recipe for personal consumption.

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