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easy healthy low carb keto marinara sauce recipe served in a white bowl
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5 from 6 votes

Low-Carb Keto Marinara Sauce

This low-carb marinara sauce is the perfect pizza or pasta sauce for anyone on a keto diet! Made with fresh plum tomatoes, onion, fresh garlic, and Italian seasoning, this smooth sauce is made with no added sugar or preservatives and is a healthy option for so many different types of meals!
Prep Time3 mins
Cook Time10 mins
Total Time13 mins
Course: Appetizer, Main Course, Side Dish, Soup
Cuisine: American, Italian, Vegan
Diet: Gluten Free, Low Calorie, Low Fat, Vegan, Vegetarian
Servings: 16
Calories: 26kcal
Author: Anjali Shah


  • 28 ounces canned crushed tomatoes 800g
  • 2 garlic cloves crushed
  • ½ onion diced
  • 1 tablespoon olive oil
  • ½ tablespoon red wine vinegar
  • 2 teaspoons dried Italian mixed herbs
  • ¼ tsp salt more to taste
  • tsp black pepper more to taste


  • Heat olive oil in a large pot. Add the diced onion and sauté until translucent, add the garlic and continue to cook for one to two minutes.
  • Add all the remaining ingredients, bring to a boil. Reduce heat and simmer for five minutes; stirring.
  • Remove from heat and allow to cool completely before storing in an airtight container in the refrigerator for five days. This recipe makes 4 cups of marinara sauce. One serving is ¼ cup.


  • If you'd prefer a thicker sauce, then simmer the sauce for an additional ten minutes.
  • Canned tomatoes may vary in flavor, if you find this sauce isn’t naturally sweet enough add 1 tsp erythritol or any other sweetener of choice.
  • Make sure you season to taste! 
  • Marinara sauce can be used as a pizza sauce, pasta sauce, as a base for soup or even for low carb shakshuka.
  • Sauce can be frozen and stored for up to 3 months.


Serving: 4tbsp | Calories: 26kcal | Carbohydrates: 4g | Protein: 1g | Fat: 1g | Saturated Fat: 1g | Polyunsaturated Fat: 1g | Monounsaturated Fat: 1g | Sodium: 102mg | Potassium: 152mg | Fiber: 1g | Sugar: 2g | Vitamin A: 107IU | Vitamin C: 5mg | Calcium: 18mg | Iron: 1mg