Marinated overnight then cooked in the oven, low and slow, turns this simple cut of beef into something amazing! I’m always astonished when a recipe with very few ingredients has an outcome that people rave about. Now, don’t get me wrong, in everyday life, I’m a positive, optimistic person and always expect the best but even this recipe surprised me!

oven cooked beef brisket

I think there are several reasons for the success of this dish. The first, is that marinating the brisket overnight in intense, flavor packed ingredients adds just the right amount of spice with a slightly tangy punch. Beef brisket can be a tough cut of meat if not done right, so letting all the ingredients “hang out” over night is important.

3 ingredient oven cooked beef brisket in roaster

The last key to this recipe’s success is cooking the brisket on a low temperature in the oven for several hours. Once you hit the 5 hour mark, something magical happens between the 3 ingredients. A beautiful, rich sauce develops and the meat turns tender and succulent. The last step is basting the brisket then cooking for an additional 45 minutes, uncovered. This brisket is perfect for Sunday supper or a dinner party. I used it for meal planning and got 2 additional meals by using it for sandwiches and nachos!

oven cooked beef brisket

oven cooked beef brisket

3 Ingredient Oven Cooked Beef Brisket

2 simple ingredients turn beef brisket into something amazing! Cooked low in slow in your oven ensures a luscious, tender slice of beef. For the supper table, sandwiches, nachos and meal planning - this is one perfect dish!
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Course: Main Course
Cuisine: American
Prep Time: 10 minutes
Cook Time: 5 hours 45 minutes
Total Time: 5 hours 55 minutes
Author: Donya |


  • 1 5-6 pound beef brisket
  • 1 1/2 cups ketchup
  • 1 package onion soup mix


  • Place brisket in a foil pan or line a larger baker with tin foil.
  • In a small bowl, mix together ketchup and onion soup mix. Pour mixture over brisket. Cover tightly with foil and place in refrigerator over night or minimum of 6 hours. 
  • Remove pan from fridge and let come to room temperature for 30 minutes. Heat oven to 275 degrees. Place brisket in oven and cook for 5 hours. 
  • Uncover pan and baste the brisket with the sauce from bottom of pan. Cook for an additional 45 minutes. Remove meat from oven and let rest for 20 minutes. Slice and serve with extra drippings.


Need a little side dish inspiration? Try serving one of these dishes alongside the star of your supper table ~

Squash casserole in cast iron skillet with cheeseSquash Casserole

summer salad with tomatoes

Summer Salad

southern greenbeans with bacon

Southern Style Green Beans

sauteed mushrooms with butter and wine

Sauteed Mushrooms

Gather up your family and maybe a few friends and enjoy!

oven roasted beef brisket to pin

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