A perfect San Marzano Tomato Sauce that is so simple to whip up at a moment's notice with just a handful of ingredients.
Keto Marinara Pizza Sauce in a jar with tomatoes and parsley

For a great low carb pizza we need a great Keto Marinara Sauce recipe right? So pizza sauces on the market have sugars added, so this is my go to very simple keto pizza sauce.

Keto Marinara Pizza Sauce in a glass bowl


Let’s keep it easy but tasty. All the ingredients in this keto marinara are more than likely in your pantry right now. Nothing fancy just some dried herbs, spices and tomatoes.

  • 400 g (14 oz) crushed tomatoes
  • 2 tablespoons extra virgin olive oil
  • ½ teaspoon sweet paprika
  • ½ teaspoon onion powder
  • ½ teaspoon garlic powder
  • ½ teaspoon dried basil
  • ½ teaspoon dried oregano
  • Salt and pepper to taste
ingredients of a marinara on a white marble backdrop


Well, aren’t you all going to love this recipe. It is so easy as there is no cooking involved! That’s right, simply mix all the ingredients and you have a keto marinara pizza sauce ready to spoon onto your keto pizza base and get cooking!

I do use a stick blender or to make a Thermomix keto marinara sauce all you need to do is place all the ingredients into the mixer bowl and mix 30 seconds speed 5. So simple.


We all love different flavours and some of us really love spicy. I used to be a total chilli-head. While my heat tolerance has possibly lowered I still love a bit of a kick on my pizza or in a keto pasta recipe.

So here are a few “extras” to throw into the marinara sauce or substitute for those ingredients you may not like.

  • Ground Cayenne Pepper – from 1/2 teaspoon and up depending on how hot you like it
  • Chipotles in Adobo – now available in the supermarket these will add a smokiness to the sauce while still keeping it a low carb pizza sauce.
  • Fresh chillies – roughly chop and extend mixing time until the pizza sauce is smooth
  • Fresh herbs – fresh basil, thyme or oregano would be perfect
  • Tomato paste will make the sauce thicker and richer. Add 1 tablespoon or more if using this as marinara for a tomato based keto marinara pasta dish. You can more as needed but it does add extra carbs
tomatoes, herbs, pepper and a jar of sauce on a wood table


Here are just a few of my favourite keto sauce recipes.

  1. Smokey Keto Barbecue Sauce
  2. Low Carb Cranberry Sauce
  3. Keto Tartare Sauce
  4. Sugar-Free Sweet and Sour Sauce
  5. Keto Big Mac Sauce
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tomatoes, herbs, pepper and a jar of sauce on a wood table

San Marzano Tomato Sauce (Marinara Sauce)

A perfect San Marzano Tomato Sauce that is so simple to whip up at a moment’s notice with just a handful of ingredients.
5 from 28 votes!
Prep Time: 2 minutes
Cook Time: 0 minutes
Total Time: 2 minutes
Course: Sauce
Cuisine: Italian
Diet: Diabetic, Gluten Free
Recipe Category: Low Carb
Calories: 36kcal
Author: Megan Ellam
Servings: 8 serves
Tap or hover over number to scale ingredients
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  • Heat oil in a pot over medium-high heat. Add garlic; cook stirring until soft.
  • Add tomatoes and tomato paste; season to taste. Bring to a boil then reduce to low. Simmer, stirring occasionally, for 45-60 minutes.
  • Mix with an immersion blender or pour into a food processor and mix if you love a smooth sauce. Stir through fresh herbs and adjust seasoning to taste.


  • Add oil and garlic to mixer; chop 4 sec/speed 4. Scrape down sides of bowl and repeat as needed. Cook 4 min/100°C/speed 2/cap off.
  • Add tomatoes and tomato paste; season to taste. Cook 15 min/100°C/speed 2/cap off. Puree sauce up to speed 10/cap on if you love a smooth sauce. Stir through fresh herbs and adjust seasoning to taste.



Recipe Notes for San Marzano Tomato Sauce:
  • San Marzano Tomatoes: Use high-quality San Marzano tomatoes, known for their sweet flavor and low acidity.
  • Olive Oil: Extra virgin olive oil enhances the richness of the sauce.
  • Onion and Garlic: Sautéed onion and garlic form the aromatic base of the sauce.
  • Fresh Basil: Chopped fresh basil adds a fragrant and authentic touch.
  • Salt and Pepper: Season to taste, balancing the flavors of the sauce.
  • Optional: Red Pepper Flakes for a hint of heat, and a pinch of sugar or a sugar substitute to balance acidity.
  • Allow the San Marzano tomato sauce to cool before storing.
  • Store the sauce in an airtight container in the refrigerator for up to 5-7 days.
  • To prolong shelf life, the sauce can be frozen in portions.
  • Tomatoes: If San Marzano tomatoes are unavailable, you can use regular canned plum tomatoes, but the flavor may vary slightly.
  • Herbs: Experiment with other herbs like oregano or thyme for different flavor profiles.
Serving Suggestions:
  • Classic Pasta Pairing: Serve the San Marzano tomato sauce over cooked pasta for a timeless Italian meal.
  • Pizza Base: Spread the sauce over your favorite low-carb pizza crust and top with cheese and desired toppings.
  • Vegetable Medley: Use the sauce as a delicious dip for roasted or grilled vegetables.
  • Meat Accompaniment: Simmer meatballs or chicken in the sauce for added flavor and moisture.
  • Soup Starter: Use as a base for tomato soup or as a flavor enhancer in other soups and stews.
With its rich flavor and versatility, your homemade San Marzano tomato sauce will elevate any dish, from pasta to pizza and beyond.

Your Own Notes


Serving: 1serve | Calories: 36kcal | Carbohydrates: 5g | Protein: 1g | Fat: 2g | Saturated Fat: 0.3g | Polyunsaturated Fat: 0.3g | Monounsaturated Fat: 1g | Sodium: 21mg | Potassium: 260mg | Fiber: 1g | Sugar: 3g | Vitamin A: 864IU | Vitamin C: 14mg | Calcium: 12mg | Iron: 0.4mg | Magnesium: 12mg | Net Carbs: 4g
Tried this recipe?Mention @meganellam or tag #madcreations!

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17 responses to “Keto Marinara Pizza Sauce”

  1. Irene

    Megan, I think you may have combined two recipes here. The cook time shown at the top of the recipe card is 0 minutes, but under conventional method it says simmer for 45 – 60 minutes. There is also a discrepancy in the ingredients shown in your photo compared with the recipe card. Could you check it please?
    Thank you.

  2. Christine R

    Hi Megan, can you use fresh tomatoes in this recipe. Although I suggested to my husband he should not grow tomatoes this year as we can eat very few – I now have about 3 kilos to use up…(and a lot more to ripen) groan.

    1. Megan Mad Creations Hub

      You sure can.

  3. Liz

    5 stars
    Used your marinara sauce on a simple pizza margarita….it was super easy and delicious!!!

    1. Megan Mad Creations Hub


  4. Jerika

    5 stars
    Wow! Can’t wait to try this Keto Pizza Marinara Sauce on my homemade pizza!:) And it’s very easy to prepare. Love it!:)

    1. Megan Mad Creations Hub

      It is so good isnt it Jerika

  5. Melinda

    5 stars
    Love the spice combination in this pizza sauce. This is delicious and a nice new twist for a homemade pizza topping!

    1. Megan Mad Creations Hub

      I am so happy you love it Melinda.

  6. Addie

    5 stars
    This homemade pizza sauce is so flavorful! It made our pizza night so fun!

    1. Megan Mad Creations Hub


  7. Jean

    5 stars
    I love pizza and this keto sauce is so great, no need to feel guilty with carbs.

    1. Megan Mad Creations Hub

      Enjoy it Jean

  8. nancy

    5 stars
    you had me at ketO! this one is delicious!

    1. Megan Mad Creations Hub


  9. sue C

    5 stars
    So easy and so tasty, i can’t understand why i ever shop bought this stuff. Thanks Megan for making our food so enjoyable.

  10. Lynda

    5 stars
    Wow what a quick and easy sauce . I used it on our pizza bases and it was delicious. It’s great to be able to use ingredients that are already in the pantry to make sugar free sauces that are full of flavour.

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