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If you love French dip sandwiches, this Slow Cooker version is going to be your new go-to. Seasoned ground beef simmers low and slow in a rich, concentrated broth that doubles as the dipping jus — and it only takes four ingredients to pull off.
Why You’ll Love It
Only 4 ingredients — ground beef, two cans of soup, one seasoning packet, and rolls
The Slow Cooker does the work — throw it together in the morning and come home to something that smells like you’ve been cooking all day
That dipping jus is everything — rich, beefy, deeply savory, and built right into the cooking liquid
Great for feeding a crowd — keep the Slow Cooker on warm and let people serve themselves
Even better the next day — leftovers reheat beautifully once the beef has soaked up even more of the jus
A Few Notes on the Ingredients
The French onion soup cans — don’t add water. I know the can says to add a can of water and I know that’s the normal thing to do with condensed soup. Don’t. The concentrated liquid is exactly what you want here; it becomes the jus. If you water it down, the dipping broth ends up thin and kind of sad.
The au jus packet is doing a lot of work for something that costs about a dollar. I usually use whatever brand’s on sale. What matters is the ratio — two cans of soup, one packet, two pounds of beef. Don’t mess with the ratio.
Ground beef: I usually go with 80/20, which I know some people avoid, but the fat is flavor. You’re going to drain most of it after browning anyway. 90/10 is fine, the jus is just a little thinner.
Ingredients
2 pounds ground beef (80/20 is my preference, 85 or 90 is fine)
2 cans condensed French onion soup, 10.5 ounces each — do not add water
1 packet dry au jus gravy mix, 1 ounce
6 to 8 hoagie rolls or sub rolls, split (I get the ones from the bakery section, not the soft sandwich rolls — you want something with a little structure)
How to Make It
Start with browning the beef, which I know feels like an unnecessary step when you’re making a Slow Cooker recipe, but it matters. Get a big skillet going over medium-high heat, break the beef in there, and let it cook until it’s no longer pink and starting to get some color on the edges — six, maybe eight minutes. Don’t rush it. I used to dump raw beef straight into the slow cooker back when I first started making this, because I read somewhere that you could, and it always came out kind of gray and loose and wrong. Brown it first.
Drain off most of the fat but not all of it. Leave a little in there — I just tilt the pan and spoon out the excess. Then get that beef into the slow cooker.
Sprinkle the au jus packet over the top of the beef. Then pour both cans of soup over everything. Don’t stir it yet. Put the lid on.
Cook on low for four to six hours. I almost always do six because I start it in the morning before I leave, and I’m never home exactly at four hours. It’s very forgiving. High for two to three hours works too if you’re in more of a rush, but I think the low-and-slow version has better depth — the beef kind of melts into the liquid and everything gets very unified.
Stir it once or twice if you remember. I usually forget and it still turns out fine.
About ten minutes before you’re ready to eat, split the rolls and put them under the broiler for just a couple of minutes. You want them to get some color and crispness, because soft rolls turn into a soggy mess the second they hit the beef and jus. Toast the rolls.
Scoop the beef onto the toasted rolls with a slotted spoon, ladle some of the cooking liquid into small bowls or ramekins on the side, and tell people to dip. They will figure it out.
Variations
If you want the jus to taste a little more sophisticated — not that there’s anything wrong with how it already is — you can swap one can of French onion soup for a can of condensed beef consommé. It makes the broth cleaner and more purely beefy. I’ve done it both ways and I genuinely can’t decide which I prefer, so I just do whatever I have in the pantry.
Throwing in a handful of chopped pepperoncini during the last hour of cooking sounds strange but is actually really good — the acidity cuts through the richness and wakes everything up. Worth trying.
Cheese is optional but not unwelcome. Lay provolone over the beef on the open rolls and slide them back under the broiler for a minute. You get this melty, slightly browned cheese situation that I won’t say transforms the sandwich but definitely makes it feel more substantial. I do this when I remember. I often forget until someone’s already eating and then I feel briefly like I’ve failed everyone.
Leftovers
Store the beef and the jus together — don’t separate them or the beef will dry out. Refrigerator, covered, up to three days. When you reheat it, add a small splash of water or beef broth because the jus thickens up in the fridge and gets a little gelatinous, which is fine, it’s just collagen, but it reheats better with a bit of liquid. Stovetop over low heat or back in the slow cooker on warm. Don’t microwave the jus in the bowls for dipping without covering it — learned that one the hard way, beef jus can spit.
I usually serve this with something simple on the side, whatever’s easiest. A bag of chips, a basic green salad, some pickle spears I didn’t have to make myself. The sandwich is the whole point. The sides are just something to do with your hands between bites.