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Keto Hamburger Soup

Keto hamburger soup with hard-seared ground beef, cauliflower and green beans in a smoky tomato broth, with 26 g protein and 7 g net carbs per bowl.

By Diego Martinez ·OCT 9, 2026
Keto Hamburger Soup
01Why this one

The first truly cold night of November is when keto hamburger soup earns its spot on my stove. I’ll be honest, my heart lives at the grill, but when the wind picks up and it’s dark by five, I bring that same love of a good sear inside and put it into one big pot.

Here’s the thing most people miss with ground beef soup. They dump the beef in, stir it around until it turns gray, and move on. That gray beef tastes like nothing. Give it a hot pot, press it flat, and leave it alone for a few minutes so it builds a dark brown crust on the bottom. That crust is the flavor. Simple can still be unforgettable, and this soup is the proof.

What you get is a pot of seared beef, soft cauliflower, snappy green beans and a smoky tomato broth that tastes like it simmered all afternoon. It’s on the table in under an hour, and it feeds a crowd.

Where hamburger soup comes from

Hamburger soup is one of those dishes that never needed a fancy name. You’ll hear it called beef and vegetable soup, and some folks call it poor man’s stew, which tells you exactly what it was built for: a pound or two of ground beef, a can of tomatoes, whatever vegetables were in the crisper drawer, and enough broth to stretch it all into dinner for a big table.

The classic pot leans on potatoes and sometimes pasta to fill it out, with carrots, onion, celery and green beans along for the ride. It’s a weeknight soup through and through. Nobody plans a party around it, but everybody goes back for a second bowl.

That flexibility is why I love it. There’s no strict recipe to protect, so you can rebuild it around what you actually want to eat, and nobody’s grandmother is going to call you out for it.

Soup season at our table

November is soup month in a lot of houses, and for good reason. The weeks around Thanksgiving get packed. There’s shopping, there’s cooking for the big day, there are leftovers to deal with after, and somewhere in there people still need a regular Tuesday dinner. A pot of hamburger soup covers that Tuesday, and the leftovers cover Wednesday’s lunch.

It’s also the kind of food that works when the house fills up. Set the pot on the back burner, put out bowls and a ladle, and people serve themselves while the game is on. If you’re feeding a bigger group that weekend, my simple keto white chicken chili is the pot I’d make right alongside it, so there’s a beef option and a chicken option on the stove.

I like to think about soup the way I think about a marinade. You build flavor in layers. Sear first. Then the vegetables pick up the browned bits. Then the tomato paste cooks down until it goes rusty red. Then the smoked paprika goes in and the whole kitchen starts to smell like a backyard cookout. Every layer matters, and none of them is hard.

Turning it into a low carb hamburger soup

The old-school version gets most of its carbs from potatoes. I swapped them for a whole head of cauliflower cut into bite-size florets. Cauliflower drinks up the broth the same way potato does, holds its shape if you don’t overcook it, and gives every spoonful something soft to bite into. This is really a keto cauliflower and hamburger soup at heart, just with a few more vegetables riding along.

I kept the carrot, but only one, diced small, so you still get that little hit of sweetness and color without the carbs piling up. The green bell pepper and green beans bring crunch and freshness. Two pounds of 85% lean ground beef give the pot real backbone, and a spoonful of tomato paste plus smoked paprika does the deep, smoky work that a long simmer would normally do.

The numbers back it up. Each bowl comes in at about 26 grams of protein and 7 grams of net carbs, with 304 calories, all worked out from USDA data for the exact ingredient list on the card. That’s a full dinner that keeps you warm, keeps you full, and fits a keto day without any math gymnastics.

One food-safety note, because it matters with ground meat. Color isn’t a reliable sign that beef is done, so check it with a thermometer and make sure it hits the USDA’s safe internal temperature for ground meat of 160°F (71°C) before you move on to the vegetables.

This soup is forgiving, so play with it:

Ground turkey or ground chicken
instead of beef for a leaner pot (cook it to 165°F).
Zucchini or chopped cabbage
in place of the green beans.
Chicken broth
if that’s what’s in the pantry; the tomato carries the flavor either way.
A pinch of red pepper flakes
with the paprika if your crew likes heat.

If you want a different direction for the same ground beef, my keto stuffed pepper soup is the cousin of this one, with more bell pepper and a cheesy finish.

04After dinner

Making it ahead and keeping leftovers

This is a great make-ahead soup. The flavors settle overnight and it honestly tastes better on day two. Let it cool, then get it into the fridge within two hours of cooking. It keeps 3 to 4 days in covered containers, and the USDA’s guidance on leftovers says to bring soups back to a rolling boil when you reheat them, which takes care of the 165°F (74°C) mark. For the freezer, portion it into single bowls and use it within 2 to 3 months for the best texture. The cauliflower softens a little after freezing, so if you’re cooking with the freezer in mind, pull the pot off the heat a couple of minutes early.

Keto hamburger soup questions

Is hamburger soup keto?

The classic version isn’t, because of the potatoes and sometimes pasta. This version swaps in cauliflower and lands at about 7 grams of net carbs per bowl, which fits easily into a keto day.

Can I make a keto cauliflower and hamburger soup in the slow cooker?

Yes. Brown the beef on the stove first until it reaches 160°F, drain it, then add everything except the cauliflower and green beans to the slow cooker on low for about 4 hours. Stir them in for the last 45 minutes so they don’t turn to mush.

What other keto soup recipes use ground beef?

Stuffed pepper soup and cheeseburger soup are both built on ground beef, and both swap the usual rice or potatoes for low carb vegetables and cheese.

Serve it hot with a handful of shredded cheddar on top and a crisp green salad on the side, and watch the second-bowl line form at the stove.

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