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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Tip: Hitting your 20–30g protein per meal goal helps you stay full and supports muscle.
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!
Brent Stiles says
Tried the recipe today.
substituted:
3/4 cup low carb milk for the 1/2 & 1/2
Added:
1 tbl dried chopped onions
1 tbl dried dill
Used the stick blender to purée.
Very happy with the results. Thanks for sharing this. I’m a type 2 diabetic and really miss Campbell’s tomato soup. This is better.
Kerry says
Delicious! I put some whisps in instead of the croutons and It was soooo good.
Kelly says
Smart!!
Joan says
Just found this recipe last month and I'm making it tonight for the second time....it is so good!!! I'll make grilled cheese on zero carb bread to go with... and dunk. (no croutons) Total comfort food, and oh so easy!!!
Sandy says
Have made this soup several times and change it up a little each time with a different spice. My favorite change so far is I used vegetable broth. I am not a vegetarian but like this better in this soup. So that is a permanent change for me and I change up the added spices each time. GREAT SOUP
Eddie H says
Doesn't get any better than this right here!
Eva says
I made this for my husband and me who were on a keto diet but recently found out we needed to add back in a bit if carbs and this soup made a beautiful simple dinner for us. With 1 cup of soup and a low carb sandwich it was sooooo good. I love your recipes ????
Kathy says
mmmmm good! Used immersion blender and topped with shredded mozzarella. Easy and quick.
Lynn says
This is hands down the best tomato soup (Keto or not). I love Campbell’s tomato bisque and I can truly say this is better. Make the croutons very crispy and brown. Best soup I’ve had in months.
Kara Rydman says
This was easy and AWESOME. Only deviation I made was adding red pepper flakes. Definitely a keeper.
Lori says
All I had on hand was a low carb marinara from Thrive Market but it works. This is perfect. I’m also making grilled cheese with low carb bread for my dinner tonight since my husband is out of town and hates tomato soup.
Robin D says
Was wonderful and creamy! I was worried with starting with marinara but it added all the good spices without having to go through the hassle. I did end up putting the whole thing in the blender after about 30 minutes of simmering. It made it so smooth and you're not missing anything with this soup!
Terri says
Perfect soup for a cold, snowy day here in Idaho. On top of the cold outside, I am not feeling well, and was wishing for something warm and comforting but it HAD TO BE Keto friendly. BINGO!
Can't wait to try this in a few minutes after it is warmed through.
Deb says
Never, ever thought I’d like anything but Campbell’s tomato soup….but, since I’ve been Keto for the past 3 years….no more Campbell’s…..and then, viola! I saw this recipe! It’s amazingly delicious! Never had such wonderful, chemical & preservative free tomato soup! I make a triple batch & freeze in zip lock bags…..so simple & yet so fantastic! Thank you for putting tomato soup back on the menu! This with a grilled cheese (made with homemade Keto bread) is the best! I’m a big fan!
Diana Meinweiser says
Ok, I'm a believer! I have never liked any tomato soup other than Campbell's. I made it for lunch today and it was amazing! I love Rao sauce but never thought about soup. Now I can have grilled cheese and tomato soup. Game changer! Thank you so much!
Brandi fry says
This was amazing! Thank you so much for this! I made it exactly as the recipe but used prego farmers market marinara (only 4 net carbs!) My whole family loved it!
EA says
Thanks for the Prego tip, Brandi. Lots cheaper. Keto based food tends to be so expensive so very nice savings with Prego.
Deborah says
This soup is soooo delicious. I would eat this soup even if I were not eating keto. I had it with a grilled cheese sandwich.I love that I can eat good food and not feel deprived. Thank you for sharing your recipes with us.
Ken says
This was amazingly delicious. I love cabbage rolls but couldn’t eat them using canned soup due to all the sugar. I was so happy. Transforming marinara sauce to tomato soup ….. who knew?
Andrea says
I will never buy a can of tomato soup again! This soup is the real deal.
Paula Harrington says
For the croutons I am going to add a couple of grinds of Italian seasoning to the 90 second bread before cooking.
Heidi says
This was absolutely delicious and so easy. I used the garlic tomato Rao's and will definitely use that flavor version again. Since I only had half and half, I added a little cream cheese for some extra creaminess. Wow. It was a hit.
Rene Lindahl says
Quick, easy and delicious!!
Katie says
Thanks so much for this recipe; it’s so fast and simple yet absolutely delicious! I would happily eat this over any other tomato soup even if I wasn’t counting carbs.
Kathy says
Really awesome! Thanks for creating recipe. Love the deep flavor given by Rao’s marinara.
Zakiya says
Delicious. I think I will use less sweetener next time.
Marilyn says
I am an old New Englander and Creamy Tomato Soup and Grilled Cheese Sandwiches are the absolute best on a cold winters day. I never leave reviews and I usually need to adjust recipes I find on the internet. At this stage of my life, I like simple things and this recipe is effortless to make. This recipe is abolutely perfect! Jennifer was right. To my surprise I had everything in the pantry to make this wonderful soup at the spur of the moment. So glad I did. Now I can enjoy an old favorite with my keto grilled cheese.
Thank you.
Paula Harrington says
You can add shredded cabbage, browned hamburger, Italian seasoning and at the end add a sprinkle of cheese for a Faux Lasagna Soup.
Virginia Doherty says
This looks delicious. I am just starting Lego and so glad I found your recipes. Thank you
Tricia says
This soup and the croutons are LEGIT!
Emily says
Delicious!!!
Tre says
Definitely glad I tried this today! It will be my go to tomato soup from now on. So easy to make and much better tasting that canned. Plus it’s keto!!
Andrea says
This was really good, thanks! I swapped the quantities of heavy whipping cream and broth. I used 1c HWC and 1/2c beef bone broth (instead of chicken broth) because I like a creamier soup & wanted to use up my bone broth. It changed the macros to 28 fat/9 net carb per serving, so not that different. I also omitted the sweetener because the soup was just so good without. This was really tasty!
Rebecca says
Can I substitute sugar free spaghetti sauce for the marinara?
jenniferbanz says
Definitely!
Patti E. says
Made this recipe and it was delicious! This will be come a staple for lunch. Try it with Pork Skins...yummy!
Lora Gardner says
Best tomato soup I have ever had!
Amberlee says
Great flavor! Way better than Campbell's and super easy! Will be keeping this on repeat at my house! Thank you!
Paula says
First let me say that I detest tomatoes. I made this soup for my family. I tasted a tiny bit and absolutely loved it. I’m making it again for the second time this week . Major yummy!!!!
SHEILA KYER says
This soup is so easy and delicious. We are making it our star for Christmas eve dinner with grilled cheese. It's even a favorite of my teenager who hates soup. Thank you.
Christine says
This soup is thick, rich and delicious. . My husband says it tastes better than the gourmet tomato soup we had at an expensive brewery restaurant. Definitely a keeper
Cheryl says
Tomato soup is my favorite and this is fabulous!
Jessica says
Tomato soup is my weakness. I made a big batch and ate it all week long for lunch. So tasty and so easy!
Claudia Lamascolo says
I love how vibrant in color this comes out and is a wonderful in flavor added can't wait to make it again!
Jim Levi says
Can I use Anything to substitute the Heavy Cream???? Thank you. P S I Love your air fryer and IP recipes
jenniferbanz says
You could try coconut milk