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Keto Tomato Sauce Recipe

Louise | July 26
Keto Tomato Sauce Recipe #keto

Tomato sauce plays such an essential role in the kitchen. Not only is it one of the five mother sauces of French cuisine, due to the many derivatives that stem from it. But, what would Italian cuisine be without tomato sauce?

Unfortunately, tomato sauce can have a surprising amount of sugar in it, which does not make it work for a keto diet. It makes it nearly impossible to find a recipe or premade tomato sauce. That is a massive shame because of all the wonderful dishes that come from the valuable sauce.

That is why this keto tomato sauce recipe is so important. Because just because you are on your diet, does not mean that you need to miss out on all of your favorite dishes. Though, it would be beneficial to eat tomatoes very conservatively.

Difference Between Tomato Sauce vs Marinara Sauce

It is a common misconception that marinara sauce and tomato sauce are identical and can be interchanged freely. The truth is they have many things that separate them.

Marinara sauce is a simple and quick foray into the kitchen. With only a few ingredients marinara sauce can be made without much complexity and is typically a much thinner sauce overall.

Tomato sauce, however, requires a few more steps and a lot of seasoning and balancing. Further, a tomato sauce is typically blended making it thicker and smoother.

Difference Between Tomato Sauce vs Pizza Sauce

Though technically it is completely okay to use tomato sauce on pizzas, there are some important differences between the two sauces.

The main reason for this is a tomato sauce can be a bit too thin or have too much water in it, that would affect the baking of the pizza dough.

Pizza sauce is much thicker, utilizing more tomato paste. Additionally, to add more flavor to the final dish, pizza sauce will often have a heavier seasoning than most tomato sauces.

Difference Between Fresh Tomatoes vs Canned Tomatoes

Well, besides the obvious, there are many things that separate fresh tomatoes and canned tomatoes. In fact, when it comes to preparing ingredients such as this tomato sauce, many cooks will swear that canned tomatoes are better.

Not kidding.

The main reason for this comes down to simplicity. Canned tomatoes are already peeled and cooked. Peeling the skin from tomatoes can be a lengthy process. Utilizing canned tomatoes can save a lot of effort when putting recipes together.

Keto Pastas to Use With Your Tomato Sauce

Now that you know that there is a keto tomato sauce, what can you put it on? Traditionally tomato sauce is paired with very carb-heavy food. That’s just how the Italians like to roll. However, a classic Italian meal would pull you out of ketosis before you can say tagliatelle.

Thankfully, there are still many things that this tomato sauce can be paired with like chicken breast or grilled eggplant.

But, if you were hoping to have a rich Italian inspired meal, we have you covered. There are many low carb pasta options to replace the carb-heavy pasta.

Ways You Can Make the Tomato Sauce Unique and Flavorful

Whenever you cook anything it is valuable to alter minor elements to make it fit your own personal style and flavor. Tomato sauce is a wonderful place to experiment. For example, if you love garlic, feel free to add as much as you like.

There are many ingredients that can find there way into your sauce. These are just a few:

  • Caramelized carrots and celery
  • Fresh or dried herbs
  • Spices
  • Chicken or beef
  • A handful of spinach
  • Ghee

As a handy tool, you can check this keto calculator to assure you don’t go overboard.

Keto Tomato Sauce Recipe #keto


Keto Tomato Sauce Recipe

  • Author: Louise Hendon
  • Prep Time: 5 minutes
  • Cook Time: 5 minutes
  • Total Time: 10 minutes
  • Yield: 8 servings 1x
  • Category: Sauce
  • Cuisine: Italian


Try this keto-friendly tomato sauce on all your favorite Italian dishes.



  1. Add the olive oil to a frying pan and sauté the onion and garlic until tender.  Then add in the tomato paste and diced tomatoes and warm for a few minutes.
  2. Season with the Italian seasoning, salt, pepper, and stevia, to taste.
  3. For a chunky Keto tomato sauce, simply let cool and store in airtight jars.
  4. For a smoother Keto tomato sauce, blend and then store in airtight jars.


All nutritional data are estimated and based on per serving amounts.

Net Carbs: 3 g


  • Calories: 34
  • Sugar: 2 g
  • Fat: 2 g
  • Carbohydrates: 4 g
  • Fiber: 1 g
  • Protein: 1 g

Did this recipe get your creative juices flowing? Try these other Keto Sauces to keep it going.


Louise co-founded Louise's Foods, Paleo Living Magazine, Nourishing Brands, & CoBionic. She has considerable research experience but enjoys creating products and articles that help move people just a little bit closer toward a healthy life they love.