This creamy keto tomato soup recipe only requires 5 simple ingredients that you probably have handy in your kitchen. Homemade tomato soup that is low-carb friendly and only takes 15 minutes to make will be a winter staple.
Keto tomato soup
Canned tomato soup is filled with ingredients that are not keto friendly such as sugar and cornstarch. Most are around 20 carbs per serving. I think my keto version is just as easy, but without all the carbs.
This easy keto tomato soup recipe has the best flavor, is only 6 net carbs, and is one of my favorite winter warmers. I could eat it multiple times per week. Paired with a low carb grilled cheese sandwich, it is the perfect meal when you want comfort food. Thanks to this easy recipe, having tomato soup on the keto diet is possible!
Keto tomato soup in 15 minutes!
So how do we make this creamy keto tomato soup in only 15 minutes? Well, we have to start with a secret shortcut ingredient. That would be a jar of sugar free marinara sauce! This little hack gives us a flavorful soup with all the tomato flavor without having to use a bunch of extra ingredients such as tomato sauce or canned tomatoes.
Stay with me here because sugar free marinara sauce (I use Rao's Pasta Sauce) isn't just for dipping keto mozzarella sticks. As a matter of fact, the sauce that I use has the ingredients tomatoes, olive oil, onions, salt, garlic, basil, black pepper, and dried oregano. All of the flavors of the best keto tomato soup!
You could also make your own sauce with my recipe for keto marinara sauce.
I love this method because there is no need for a blender, food processor, or immersion blender. We get a comforting bowl of homemade tomato soup with no added effort.
Another reason I love to use a jar sugar free marinara for this low carb tomato soup is because tomatoes are in season in the Summer, I want this soup in the Winter when it's cold outside!
Creamy tomato soup
I added a few additions to give the soup even more flavor and to make it creamy. This includes heavy whipping cream, sweetener, chicken broth, and tomato paste. It tastes just like the perfect roasted tomato soup recipe.
We add the sugar free sweetener to cut through the acidity in the sugar free marinara.
Even though this creamy tomato soup only uses 5 ingredients and 15 minutes, it is still thick, comforting, and filled with flavor like it has been cooking on the stovetop all day.
Croutons to top the soup
If you noticed, I have some super crispy croutons on top of my soup. For those I use my recipe for 90 second keto bread, cut it into cubes, and brown them under the broiler. They make perfect gluten free croutons!
Tips for the best low-carb tomato soup
- Store in the refrigerator in an airtight container for up to 1 week
- Make keto grilled cheese sandwiches with low carb bread to serve along side the soup!
- Use coconut cream or full fat coconut milk in place of the heavy cream for a dairy-free option.
- Top with fresh basil for some added freshness or stir some in for a tomato basil soup.
Check out these other comforting keto soup recipes
I am a huge soup fan and I can eat it any season and any time of day. Try my Keto Bacon Cheeseburger soup if you are looking for something a little more heartier.
My Keto Cream of Mushroom Soup is perfect as a hug in a bowl or to replace cream of mushroom soup in a recipe.
Another hearty soup that is a family favorite is my Keto Chicken Pot Pie soup. I use my Low Carb cheddar biscuits to top the soup. Those biscuits would be delicious with this tomato soup, too!
Creamy Keto Tomato Soup Recipe - Only 15 Minutes!
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Ingredients
- 24 oz sugar free Jar Marinara
- 1 Cup chicken stock
- ½ Cup Heavy cream
- 2 Tablespoons Tomato paste
- 2 Tablespoons sugar free granulated sweetener (see my favorite on Amazon)
- Kosher salt and pepper to taste
Instructions
- Combine all of your ingredients in a medium size sauce pan over medium heat.
- Cook until all the ingredients have been cooked together throughly and bubbling. Should take about ten minutes. If you would like a completely smooth keto tomato soup, you can carefully use an immersion blender to blend the soup.
- Season with salt and pepper to taste. If you like your tomato soup a little on the spicy side, you can add some red pepper flakes or cayenne pepper.
Notes
- Please be aware that using a different brand of marinara could change the carb count. I use Rao's because it has no added sugar like most marinaras have.
- I use a sugar free sweetener to cut through the acidity in the marinara. This is essential for really good tomato soup!
- Croutons: For those I use my recipe for 90 second keto bread, cut it into cubes, and brown them under the broiler. They make perfect gluten free croutons!
Nutrition per serving
Nutrition is provided as a courtesy only. Please re-calculate on your own with the ingredients and amounts you used for the most accurate data.
Linda Brandt says
I just made this tonight. So good!
Lynn says
What a relief from other heavy non-carb foods. I’ve always enjoyed canned tomato soup made with milk and this recipe is a perfect replacement. I omitted the tomato paste as I didn’t have it on hand, but will try it next time. I used a full 48oz jar of sugar-free marinara from Costco and scaled accordingly. I may blitz it next time, but tomato pieces don’t bother me. I’ll always have this on hand in fridge or freezer! A dash or two of hot sauce would be nice, too!
Deb says
This is an awesome tomato soup recipe! We’re Keto….5 years & counting! We have this wonderful, flavorful tomato soup with a “Tuna melt” made on Carb Counter tortillas with cheese…baked in the air fryer………oh so yummy! Thank you for a fantastic recipe….Campbells soup has nothing on you! The best ever!
Heather Ozee says
We love this soup in our Keto house. For an easy vegetable soup I use this as the base (I leave out tomato paste) and add green beans, cauli rice and broccoli! So good 😊
Mike McConnell says
Probably not keto but Mom used to make tomato soup and toasted cheese sandwich. She would put butter in a frying pan and cook the bread on each side, add cheese and mustard and warm the sandwich until the cheese melted.
I wish you could have a jar of our home canned tomatoes that are dead ripe when we can them. I doubt you would need a sweetener if you used them.
TBrown says
Great Soup - I love tomato soup and was sad to give it up. Tastes great without the sweetener too! Thanks
Gail says
Love this recipe! Delicious!! I had a jar of Rao’s Marinara (usually pricey but more reasonable at Sam’s in a two pack) in the cabinet and was looking for something different to do with it. It’s actually not really one of my favorites but I buy it because of the lower sugar. I know just what I’ll use it for from now on! Tomato soup, specifically this tomato soup! So much better than anything you’ll find in a can.
Danielle says
My son can’t stand tomato soup but loves this recipe! I made it a week ago and he’s requesting it again for tonight!
Vince C says
We have been on a tomato soup kick lately, but we felt guilty about the high carbs. We tried this recipe (followed the recipe exactly) tonight and it was fantastic-- better than a lot of non-Keto tomato soups and really easy to make. We'll be eating this one a lot. Thanks for sharing!
Jeanne Wise says
This soup was incredible. EASY and the taste was spot on. I didn't use the full amount of sugar - used maybe half - but followed the rest exactly. Thank you for this recipe as I love Creamy Tomato Soup and the carbs in store bought soup are prohibitive!
Ellyn Buckley says
Can the croutons be "toasted" in a skillet with butter?
jenniferbanz says
That should work!
Vicki OBrien says
I've been looking for a low carb but easy tomato soup recipe and though I was skeptical of using marinara, I was super impressed with the outcome! Raos isn't cheap but the flavor is amazing and well worth it. My store was out of heavy cream so I used half and half and it turned out just fine. Bookmarking this one for later!
Earl Budlove says
Tried this before and loved it, this time I added 2 tbs of basil tasted just like progresso tomato basil with a whole lot less carbs
Kim Hallock says
The Tomato soup was delicious!!!!!!!
Leigh says
Does the carb count include the croutons?
Thanks! It was delicious !
Patty Boyes says
Can this soup be used in recipes
jenniferbanz says
Yep!
Elizabeth says
Hi, I LOVE tomato soup and I must say, even tho I forgot the tomato paste..it was still maybe the best tomato soup I have ever had! I put some extra sharp shredded cheese on top and crushed up some parm crisps (everything flavored) and ate a bowl of it in under 5 minutes (really more like 3) - Even if I wasn’t doing keto, I would still make it this way from now on!! Thank you so much, can’t wait to try more of your recipes!!
Terri says
LOVE this recipe! So comforting!!
Alexes says
I have made this soup and absolutely love it. I’ve added some raw shrimp at the end for some more protein and it’s an entire meal. Thank you
Tina says
This is the best and easiest keto tomato soup ever! I love how you make keto/low carb simple and easy for the everyday normal cook
Tess says
So easy and so incredibly delicious
Barb says
Made this tonight....definitely a keeper!!
Heather says
Awesome recipe. It was quick and easy to make, and the soup was delicious.