This homemade keto spaghetti sauce is full of bright, savory flavor. Made from fresh tomatoes and simple pantry ingredients, it yields a rich, satisfying sauce perfect for low-carb meals.
You’ll earn compliments whenever you serve this homemade keto spaghetti sauce. For me, homemade sauce brings back warm memories of family meals and a kitchen filled with the aroma of simmering tomatoes. This version captures that classic, comforting flavor while keeping the recipe low in carbs.
Tomatoes, onions, and garlic
This sauce uses two kinds of tomatoes for balanced flavor and texture: vine-ripened tomatoes for juiciness and bold tomato flavor, and Roma (plum) tomatoes to add natural sweetness and help thicken the sauce as they break down. A diced yellow (or white) onion and minced garlic build the savory base. I simmered the sauce about 45 minutes, but if your tomatoes are especially juicy you may want to simmer a bit longer to reach your preferred thickness.
Other ingredients that make this sauce shine
A small but distinctive addition to this sauce is chopped Kalamata olives. They lend a pleasant briny depth that complements the tomatoes without overwhelming the dish. The seasoning mix includes dried basil, oregano, parsley, and rosemary; you can use fresh herbs if preferred (use about three times the amount of fresh versus dried). A touch of granulated keto-friendly sweetener balances the acidity—adjust to taste.
Ways to serve this keto spaghetti sauce
This sauce pairs well with several low-carb options. Hearts of palm noodles are a favorite for their texture and are available in styles such as angel hair, linguine, or spaghetti—rinse and boil to your desired doneness. Shirataki noodles are another option, though their texture differs from traditional pasta. The sauce also works wonderfully as a dip for low-carb pizza chips, pepperoni cheese bites, pizza roll-ups, or as a companion to baked chicken nuggets and chicken Parmesan bites.
More homemade keto sauces
If you enjoy making sauces from scratch, consider trying other low-carb options such as keto barbecue, Carolina gold-style BBQ, cocktail sauce, or a low-carb tzatziki for variety and flavor.
Helpful hints
* Depending on how juicy your tomatoes are, you may need to simmer the sauce longer for it to thicken to your liking.
* For a little heat, stir in red pepper flakes to taste.
Main kitchen equipment and utensils
- Large stockpot
- Measuring spoons
- Immersion blender (or a stand blender for cooling and blending)
A word of encouragement
***But as for me, I trust in You, O LORD; I say, “You are my God.” Psalm 31:14***
Homemade Keto Spaghetti Sauce
8 Servings
15 minutes
45 minutes
1 hour
This homemade keto spaghetti sauce is bursting with flavor! We start with fresh tomatoes which results in an amazingly rich and delicious sauce!
Ingredients
- 2 tablespoons butter
- 2 tablespoons olive oil
- ½ medium onion, diced
- 4 garlic cloves, minced
- 3 pounds vine-ripened tomatoes, chopped
- 1 pound Roma tomatoes, chopped
- ½ cup chopped Kalamata olives
- 1 tablespoon dried basil
- 1 tablespoon dried oregano
- ½ tablespoon dried parsley
- ½ tablespoon dried rosemary
- 1 teaspoon granulated sugar substitute (Swerve) or another keto sweetener, to taste
- ½ teaspoon salt
- ½ teaspoon pepper
Instructions
- In a large stockpot over medium heat, melt the butter with the olive oil. Add the diced onion and cook until softened, about 5–7 minutes. Add the garlic during the last minute and cook briefly.
- Add the chopped tomatoes, chopped Kalamata olives, dried herbs, sweetener, salt, and pepper. Bring the mixture to a boil over high heat.
- Reduce heat to medium-low and simmer, uncovered, for about 45 minutes or until the sauce reaches your desired thickness, stirring occasionally.
- Blend the sauce to your preferred consistency with an immersion blender. Alternatively, cool slightly and blend in batches in a stand blender.
Nutrition Information:
Yield: 8
Serving Size: 1
Amount Per Serving:
Calories: 144Total Fat: 11gSaturated Fat: 3gTrans Fat: 0gUnsaturated Fat: 7gCholesterol: 8mgSodium: 318mgCarbohydrates: 11gNet Carbohydrates: 7gFiber: 4gSugar: 6gProtein: 2g
Nutrition estimates are provided as a courtesy and may vary based on brands and ingredient choices. Net carbs are calculated as total carbs minus fiber.
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