That's it!
No long shopping list.
No complicated sauce.
No chopping a mountain of vegetables.
Just three simple ingredients doing some serious work.
Optional Additions
The recipe is delicious with just three ingredients, but you can add a few extras if you'd like.
Consider:
- Fresh sliced onions
- Minced garlic
- Fresh thyme
- Fresh rosemary
- Black pepper
- Worcestershire sauce
- A splash of beef broth
- Sliced mushrooms
These additions aren't necessary, but they can give the brisket a slightly different flavor profile.
What Kind of Brisket Should You Buy?
A whole brisket is made up of different sections, including the flat and point.
For a recipe like this, a brisket flat is often convenient because it has a relatively uniform shape and slices neatly.
The point contains more fat and can produce especially rich, succulent results.
Whichever cut you choose, look for a piece with some visible marbling. Fat helps contribute flavor and moisture during the long cooking process.
Tools You'll Need
You don't need much.
- Dutch oven or large covered roasting pan
- Measuring tools
- Sharp knife
- Cutting board
- Tongs
- Spoon or spatula
- Meat thermometer
That's about it.
How to Make 3-Ingredient French Onion Brisket
Step 1: Preheat the Oven
Preheat your oven to 325°F (165°C).
A low, steady oven temperature gives the brisket plenty of time to become tender.
Step 2: Prepare the Brisket
Pat the brisket dry with paper towels.
Trim away any unusually thick areas of surface fat, but don't remove every bit of fat.
A little fat is a good thing here.
If desired, season the brisket lightly with black pepper.
Keep in mind that the onion soup mix and condensed soup are already quite salty, so additional salt may not be necessary.
Step 3: Add the French Onion Soup
Place the brisket in a large Dutch oven or covered roasting pan.
Pour the condensed French onion soup over and around the beef.
Sprinkle the dry onion soup mix evenly over the top.
That's really all the preparation you need.
Step 4: Cover and Cook
Cover the pot tightly with its lid or aluminum foil.
Place it in the preheated oven.
Cook for approximately 3–4 hours, depending on the size and thickness of the brisket.
The exact cooking time can vary, so don't rely on the clock alone.
The brisket should become very tender, and a fork should slide into the meat with little resistance.
Step 5: Check the Brisket
Start checking the brisket toward the end of the cooking time.
For the most reliable result, use a meat thermometer along with a tenderness check.
Brisket is a tough cut that contains connective tissue, so it generally needs extended cooking to become tender.
If it's still firm, give it more time.
Don't panic!
That's often the difference between "pretty good brisket" and fall-apart tender brisket.
Step 6: Rest the Meat
Once the brisket is tender, carefully remove it from the cooking liquid.
Place it on a cutting board and loosely tent it with foil.
Let it rest for about 15–20 minutes before slicing.
This gives the juices time to redistribute.
Step 7: Slice Against the Grain
This step is important.
Look carefully at the direction of the muscle fibers.
Then slice the brisket against the grain.
Cutting across the fibers shortens them, making each bite much easier to chew.
Slice fairly thinly and arrange the beef on a serving platter.
Step 8: Spoon Over the Onion Sauce
Spoon some of that gorgeous French onion cooking liquid over the sliced brisket.
And don't throw the rest away!
That sauce is practically begging to be poured over mashed potatoes.
How to Make This Brisket Even More Flavorful
Although this is intentionally a 3-ingredient recipe, there are a few little tricks that can make a noticeable difference.
Sear the Brisket First
For extra browned flavor, sear the brisket in a little oil in a Dutch oven before adding the soup.
You don't have to do this, but browning creates additional flavor on the surface of the meat.
Add Fresh Onions
If you're an onion lover, add a sliced yellow onion to the pot.
As it cooks in the French onion sauce, it becomes incredibly soft and savory.
Don't Keep Opening the Oven
Every time you uncover the brisket, heat escapes.
Keep the pot covered and let the oven do its work.
Give It Time
This is not a recipe to rush.
Brisket contains connective tissue that needs time to break down.
If your brisket isn't tender yet, keep cooking it.
What to Serve With French Onion Brisket
Now we're getting to the really fun part.
This brisket practically demands some kind of side dish to soak up that delicious onion sauce.
Mashed Potatoes
My first choice.
Creamy mashed potatoes + French onion brisket gravy = absolute comfort food.
Roasted Vegetables
Try:
- Carrots
- Green beans
- Brussels sprouts
- Broccoli
- Root vegetables
Egg Noodles
Serve the sliced brisket and onion sauce over buttery egg noodles for a hearty meal.
Crusty Bread
Never underestimate a good piece of crusty bread.
It's perfect for soaking up every last bit of sauce.
Simple Green Salad
If you're serving this as a heavier Sunday dinner, a crisp green salad adds a fresh contrast.
Can You Make French Onion Brisket Ahead?
Yes, and it's actually a fantastic make-ahead meal.
Brisket often reheats beautifully, and the flavors have even more time to mingle after sitting overnight.
Prepare the brisket, allow it to cool, and refrigerate it in its cooking liquid.
When you're ready to serve, gently reheat it until hot throughout.
How to Store Leftover Brisket
Place leftover brisket and some of the sauce in an airtight container and refrigerate promptly.
For best quality, enjoy refrigerated leftovers within 3–4 days.
Keeping the meat with some of the sauce helps prevent it from drying out.
Can You Freeze French Onion Brisket?
Absolutely.
Slice the cooled brisket and place it in a freezer-safe container with some of the onion sauce.
Freeze for up to 2–3 months for best quality.
Thaw overnight in the refrigerator, then reheat gently.
Avoid overheating the meat, since that can make the brisket dry.
Frequently Asked Questions
Can I make this recipe in a slow cooker?
Yes. Brisket works very well in a slow cooker. Place the brisket in the slow cooker, add the French onion soup and onion soup mix, cover, and cook until the meat is tender.
Cooking times vary by appliance and brisket size, so use tenderness as your guide.
Do I need to add water to the condensed soup?
Generally, no.
For this recipe, the condensed soup is being used as part of the concentrated cooking sauce rather than prepared according to the can's directions.
Why is my brisket tough?
It probably needs more cooking time.
Brisket can remain tough for quite a while before the connective tissue breaks down and the meat becomes tender.
Should I remove all the fat?
No.
Removing excessively thick surface fat is reasonable, but leaving some fat helps with flavor and moisture.
Why should I slice brisket against the grain?
Slicing against the grain cuts through the long muscle fibers, resulting in more tender bites.
Can I add potatoes to the pot?
You can, although potatoes may become very soft during the long cooking time. For more distinct pieces, consider roasting or boiling them separately and serving them with the brisket.
Is French onion brisket good for a holiday dinner?
Absolutely.
It's especially convenient for gatherings because you can prepare it ahead and reheat it gently before serving.
Recipe Information
Prep Time: 10–15 minutes
Cook Time: 3–4 hours
Resting Time: 15–20 minutes
Total Time: About 4 hours
Servings: 8–10
Category: Main Course
Cuisine: American-inspired comfort food
Method: Oven-braised
Nutrition Information
Approximate nutrition per serving, depending on the size and fat content of the brisket:
- Calories: 400–500
- Protein: 40–50g
- Fat: 20–30g
- Carbohydrates: 8–12g
- Sodium: 900–1,300mg
The sodium content can vary considerably depending on the brands of condensed soup and onion soup mix used.
These numbers are estimates and are provided for general informational purposes.
Final Thoughts
I love recipes that prove you don't need a dozen ingredients to make something that tastes like you spent all day cooking.
This 3-Ingredient French Onion Brisket is exactly that kind of recipe.
The brisket slowly cooks in a rich onion-filled sauce until it's tender, juicy, and packed with savory flavor. Then you slice it up, spoon that gorgeous sauce over the top, and suddenly dinner feels like a special occasion.
And the best part?
You did almost no work.
Serve it with mashed potatoes, your favorite vegetables, and maybe a little crusty bread for soaking up the sauce.
Then sit down and enjoy.
Because when a three-ingredient recipe tastes this good, there's really no reason to make dinner complicated!