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Home » Recipes » Keto Tomato Sauce Recipe (Sugar-Free)

Christel OerumBy Christel Oerum on May 5, 2020, Updated May 24, 2020
Recipes

This post may contain affiliate links. Please read my disclosure.

Keto Tomato Sauce Recipe (Sugar-Free)

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Homemade keto tomato sauce
Homemade keto tomato sauce
Keto tomato sauce pin

This recipe for sugar-free keto tomato sauce is full of flavor and can be used in so many recipes. All while only using 5 ingredients!

keto tomato sauce in glass jar

While tomatoes are keto-friendly, store-bought versions of tomato sauce can be full of hidden sugars, carbs and who knows what else that isn’t good for you.

This is a simple keto tomato sauce recipe that you can use in any way you like. Use this sauce on a cauliflower pizza crust, low-carb eggplant parmesan, or a keto pizza casserole.

The sauce can easily be prepared ahead, saving you time in the kitchen.

How to make keto tomato sauce

Step 1: In a small saucepan over medium-high heat, saute the garlic in the olive oil. Saute for a minute until the garlic is fragrant. Make sure the garlic doesn’t brown and become burnt.

garlic being fried in olive oil

Step 2: Turn the heat down and add the tomatoes, oregano, vinegar, and salt to the saucepan. Bring to a simmer and allow to cook for 30 – 40 minutes, allowing the sauce to reduce and thicken.

sauce being cooked until thick with wooden spoon

Step 3: Use the sauce immediately if desired or store for later use.

Make a batch and store it!

You can use this sugar-free tomato sauce immediately if desired or it can be stored for later use. To store the sauce, allow it to cool to room temperature first. Once cooled, transfer to an airtight container and refrigerate for up to 5 days. 

You can also freeze the sauce after it has cooled to room temperature. Freeze in bags or a container for up to 6 weeks. Defrost before use. 

tomato sauce in pot with spoon

Spicing it up!

Because this keto marinara sauce only uses 5 simple ingredients, it’s a great base that you can add other flavors to.

It tastes fantastic as it is, of course, but you can change the flavor profile by adding additional spices such as basil or parsley. You can also adjust the heat by adding red pepper flakes or even chopped chili peppers.

A sweet sugar-free tomato sauce?

The fact that this sauce is sugar-free doesn’t mean that it can’t be a little sweet! There are many no-carb sweeteners that you can eat on a keto diet.

I have made this sauce with a little bit of Stevia sweetener and it turned out great. Monkfruit sweetener is also a great option. Just be careful and add a little at a time as both sweeteners are quite strong.

Other healthy low-carb recipes to try

If you liked this recipe, here are some other low-carb recipes you might enjoy: 

  • Keto Gravy
  • Keto Ranch Dressing 
  • Cauliflower Alfredo Sauce

You can also check out the roundup I created of Healthy Dinner Recipes for Diabetics for even more great recipe ideas.

When you’ve tried this keto tomato sauce recipe, please don’t forget to let me know how you liked it and rate the recipe in the comments below!

Recipe Card

Keto Tomato Sauce

This is the best recipe for a keto tomato sauce that is full of flavor and can be used in so many recipes. All while only using 5 ingredients!
Prep Time:5 minutes
Cook Time:30 minutes
Total Time:35 minutes
Author:Christel Oerum
Servings:10 servings
featured image for tomato sauce recipe
4.54 from 15 votes
Review Print

Ingredients

  • 1/4 cup extra virgin olive oil
  • 3 cloves garlic finely diced
  • 1 28 ounce can diced tomatoes
  • 1/2 tsp. dried oregano
  • 1 tsp. white vinegar
  • 1/2 tsp. salt
US Customary – Metric

Instructions

  • In a small saucepan over medium-high heat, saute the garlic in the olive oil. Saute for a minute until the garlic is fragrant. Make sure the garlic doesn’t brown and become burnt.
  • Turn the heat down and add the tomatoes, oregano, vinegar, and salt to the saucepan. Bring to a simmer and allow to cook for 30 – 40 minutes, allowing the sauce to reduce and thicken.

Recipe Notes

You can use this tomato sauce immediately if desired or it can be stored for later use. To store the sauce, allow it to cool to room temperature first. Once cooled, transfer to an airtight container and refrigerate for up to 5 days. 
You can also freeze the sauce after it has cooled to room temperature. Freeze in bags or a container for up to 6 weeks. Defrost before use. 

Nutrition Info Per Serving

Nutrition Facts
Keto Tomato Sauce
Amount Per Serving
Calories 58 Calories from Fat 52
% Daily Value*
Fat 5.8g9%
Saturated Fat 0.9g5%
Trans Fat 0g
Polyunsaturated Fat 0.6g
Monounsaturated Fat 4g
Cholesterol 0mg0%
Sodium 6mg0%
Potassium 128.2mg4%
Carbohydrates 1.5g1%
Fiber 0.5g2%
Sugar 1g1%
Protein 0.7g1%
Vitamin A 0IU0%
Net carbs 1g
* Percent Daily Values are based on a 2000 calorie diet.
Course: Side Dish
Cuisine: American
Keyword: keto marinara sauce, Keto tomato sauce
Did you make this recipe?Click here to leave a comment & star rating!
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Categories: Recipes Tags: Dairy Free, Gluten Free, Keto, Vegan, Lunch & Dinner, Side dishes

Christel Oerum

About Christel Oerum

Christel is the founder of Diabetes Strong. She is a Certified Personal Trainer specializing in diabetes. As someone living with type 1 diabetes, Christel is particularly passionate about helping others with diabetes live active healthy lives. She’s a diabetes advocate, public speaker, and author of the popular diabetes book Fit With Diabetes.

View all posts by Christel Oerum

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Reader Interactions

Comments

  1. AvatarBecky says

    February 4, 2021 at 5:26 pm

    Mine isn’t reducing. Was I supposed to drain the tomatoes? Thanks

    Reply
    • Tobias OerumTobias Oerum says

      February 5, 2021 at 11:30 am

      No, draining the tomatoes shouldn’t be necessary. The sauce is supposed to have a liquid consistency (it’s not ketchup) but of course it shouldn’t be completely runny. If you don’t think it has reduced enough, you can cook it for longer. The flavor just gets more concentrated the longer you cook the sauce.

      Reply
      • AvatarBecky says

        February 11, 2021 at 5:31 pm

        Thanks!

        Reply
  2. AvatarLinsey says

    February 2, 2021 at 7:47 am

    What is a serving?

    Reply
    • Christel OerumChristel Oerum says

      February 2, 2021 at 9:31 am

      The serving size for all of our recipes is listed on the recipe card. This recipe yields 10 servings and depending on how long you cook the sauce for that would be about 2-3 oz. per serving

      Reply
  3. Avatarfae says

    November 5, 2020 at 6:33 am

    hi, can I can this sauce?

    Reply
  4. AvatarProvidence says

    September 27, 2020 at 11:54 pm

    Can l add a sweetener like stevia

    Reply
    • Christel OerumChristel Oerum says

      September 28, 2020 at 11:26 am

      Yes, that won’t change the carb count and just add a little more sweetness

      Reply
  5. AvatarJim says

    September 8, 2020 at 2:49 pm

    The diced tomato can has sugar in it. What type with no sugar do you use?

    Reply
    • Christel OerumChristel Oerum says

      September 9, 2020 at 4:44 pm

      I don’t I’ve seen canned tomatoes with added sugar, however, they will have a limited amount of naturally occurring sugars. Generally, a can of tomatoes shouldn’t have more than 20 grams of carbs total

      Reply
  6. AvatarCarter Jokiel says

    August 8, 2020 at 9:53 am

    How many grams is a serving?

    Reply
    • Christel OerumChristel Oerum says

      August 8, 2020 at 12:07 pm

      It will depend on how long you cook it but should be around 85 grams per serving

      Reply
  7. AvatarDenise says

    July 4, 2020 at 12:19 pm

    Why does it have vinegar? It seems it would be too acidic with the acid in tomatoes.

    Reply
    • Christel OerumChristel Oerum says

      July 4, 2020 at 2:56 pm

      That’s how we like it but you can experiment with omitting it

      Reply
  8. AvatarBishaka Debbarma says

    June 4, 2020 at 12:10 pm

    I never like it when my ketchup is too sweet, so this is actually what I needed. Thanks!!!

    Reply
  9. AvatarGourav Debbarma says

    June 4, 2020 at 11:02 am

    woah! nice recipe…
    This keto tomato sauce will be perfect for keto diet as one can relax and consume without worrying about sugar.

    Reply

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