There’s something incredibly comforting about a warm bowl of spaghetti, especially when it’s topped with a rich and flavorful sauce. For those following a ketogenic lifestyle, traditional pasta and sauce can feel off-limits. But fear not! This Keto Spaghetti Sauce is here to save the day. With its robust flavors and wholesome ingredients, this sauce not only complements your favorite low-carb pasta alternatives but also stands alone as a delicious topping for vegetables or proteins. Let’s dive into this savory recipe that will surely become a staple in your meal prep.
The Upside of Keto Spaghetti Sauce

What makes this Keto Spaghetti Sauce truly special? First and foremost, it’s packed with flavor while being low in carbohydrates, making it perfect for anyone looking to keep their carb count in check. It’s also incredibly versatile; you can serve it over zucchini noodles, spaghetti squash, or even use it as a base for a hearty meat dish. Plus, it’s a one-pot wonder—easy to prepare and clean up after, leaving you with more time to enjoy your meal and less time washing dishes.
Ingredient Breakdown
To create this delicious sauce, you’ll need the following ingredients:
- 1 small onion, finely chopped: Adds sweetness and depth of flavor.
- 2 stalks celery, finely chopped: Provides a subtle crunch and additional flavor.
- 2 cloves garlic, minced: A must-have for that aromatic kick.
- 2 tablespoons olive oil: For sautéing and adding richness.
- 54 ounces crushed tomatoes, canned: The base of your sauce; opt for no-salt-added versions for better control over seasoning.
- 1/4 cup basil, roughly chopped: Fresh herbs elevate the dish and add brightness.
- 1/2 teaspoon salt, to taste: Essential for enhancing the flavors.
- 1/2 teaspoon pepper: For a bit of spice.
Cook’s Kit
Before you start, gather these kitchen essentials:
- Large saucepan: For cooking the sauce.
- Wooden spoon: Perfect for stirring and combining ingredients.
- Knife and cutting board: For chopping vegetables.
- Measuring spoons: To ensure you get the right amounts of salt, pepper, and olive oil.
Keto Spaghetti Sauce: From Prep to Plate

Ready to make your Keto Spaghetti Sauce? Let’s walk through the steps together.
Step 1: Sauté the Aromatics
In your large saucepan, heat the olive oil over medium heat. Add the finely chopped onion and celery, stirring frequently until they become translucent, about 5-7 minutes. Next, toss in the minced garlic and sauté for an additional minute until fragrant.
Step 2: Add the Tomatoes
Pour in the crushed tomatoes, stirring well to combine with the sautéed vegetables. This is where the magic starts to happen, as the ingredients meld together to create a flavorful base.
Step 3: Season to Perfection
Sprinkle in the salt and pepper, adjusting to your taste. Allow the sauce to simmer on low heat for about 20 minutes. This simmering time is crucial as it allows the flavors to develop beautifully.
Step 4: Finish with Fresh Basil
Once the sauce has thickened slightly, stir in the roughly chopped basil. Allow it to cook for an additional 5 minutes. The fresh basil will add a vibrant flavor that will elevate your sauce to new heights.
Step 5: Serve and Enjoy
Your Keto Spaghetti Sauce is now ready! Serve it over your favorite low-carb pasta alternative or enjoy it with grilled chicken or zucchini noodles. Don’t forget to top it with some grated Parmesan for an extra indulgence!
International Equivalents

If you’re looking to swap out ingredients or adapt the flavors, here are some equivalent options from various cuisines:
- Onion: Shallots or leeks can be used for a milder flavor.
- Olive oil: Avocado oil is a great alternative if you prefer a different taste.
- Crushed tomatoes: If fresh tomatoes are in season, you can use about 2 pounds of fresh tomatoes, diced.
- Basil: Oregano or thyme can be substituted for a different herbaceous note.
Behind the Recipe
This Keto Spaghetti Sauce is inspired by traditional Italian cooking but tailored for a modern audience craving lower-carb options. The balance of sweet onions and fresh basil captures the essence of Italian cuisine while ensuring it fits into a ketogenic lifestyle. It’s a simple yet satisfying recipe that showcases how easy it can be to enjoy flavorful food without compromising your dietary goals.
How to Store & Reheat
If you find yourself with leftovers (or if you’re meal prepping!), here’s how to properly store and reheat your sauce:
- Storage: Allow the sauce to cool completely, then transfer it to an airtight container. It will last in the refrigerator for up to 5 days.
- Freezing: You can freeze the sauce in portions for up to 3 months. Just make sure to use freezer-safe containers.
- Reheating: To reheat, simply warm it on the stovetop over medium heat until heated through, stirring occasionally. You can also microwave it in short intervals, stirring in between.
Keto Spaghetti Sauce FAQs
Can I make this sauce ahead of time?
Absolutely! This sauce actually tastes better the next day as the flavors continue to meld. You can make it in advance and store it in the fridge or freezer for later use.
What can I serve with Keto Spaghetti Sauce?
This sauce pairs wonderfully with zucchini noodles, spaghetti squash, or even as a topping for grilled meats. You can also use it in dishes like Spaghetti With Italian Sausage And Olives for a hearty meal.
Is this sauce spicy?
This recipe is not spicy, but you can add red pepper flakes or cayenne pepper if you prefer a little heat.
Can I use fresh tomatoes instead of canned?
Yes! You can use fresh tomatoes, about 2 pounds, diced, in place of canned crushed tomatoes. Just be sure to simmer longer to achieve the desired thickness.
If you’re looking for more delicious recipes to try, check out these reader favorites:
Ready, Set, Cook
Now that you have the recipe for this flavorful Keto Spaghetti Sauce, it’s time to roll up your sleeves and get cooking! This sauce is not just a meal; it’s a celebration of flavors that will bring joy to your table. Enjoy the process of creating something delicious that fits your dietary needs, and share it with family and friends. Happy cooking!

Keto Spaghetti Sauce
Ingredients
Equipment
Method
- In your large saucepan, heat the olive oil over medium heat. Add the finely chopped onion and celery, stirring frequently until they become translucent, about 5-7 minutes. Next, toss in the minced garlic and sauté for an additional minute until fragrant.
- Pour in the crushed tomatoes, stirring well to combine with the sautéed vegetables. This is where the magic starts to happen, as the ingredients meld together to create a flavorful base.
- Sprinkle in the salt and pepper, adjusting to your taste. Allow the sauce to simmer on low heat for about 20 minutes. This simmering time is crucial as it allows the flavors to develop beautifully.
- Once the sauce has thickened slightly, stir in the roughly chopped basil. Allow it to cook for an additional 5 minutes. The fresh basil will add a vibrant flavor that will elevate your sauce to new heights.
- Your Keto Spaghetti Sauce is now ready! Serve it over your favorite low-carb pasta alternative or enjoy it with grilled chicken or zucchini noodles. Don’t forget to top it with some grated Parmesan for an extra indulgence!
Notes
- Allow the sauce to cool completely before storing in an airtight container for up to 5 days in the refrigerator.
- You can freeze the sauce in portions for up to 3 months in freezer-safe containers.
- This sauce tastes even better the next day as the flavors meld.
