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Crockpot Spaghetti Sauce {Vegan}

This fresh, homemade Crockpot Spaghetti Sauce is a delicious meatless sauce made from scratch. This sugar-free spaghetti sauce creates magic from fresh tomatoes and herbs.

a bowl of crockpot spaghetti sauce with tomatoes and herbs

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Have you ever thought “can I make spaghetti sauce in a crockpot” to yourself? Yes, you sure can!

And you should because then you don’t have to stir a pot all day long for hours and hours. Snoooooore. The slow cooker heats evenly and gently and does its thing without burning the sauce. Pure magic my friends. Pure magic.

Would you rather use canned tomatoes to make sauce? If so, check out this Freezer Spaghetti Sauce that uses canned goods and pantry staples.

What Kind of Tomatoes Work Best in Crockpot Spaghetti Sauce?

Heartier paste-style tomatoes are the easiest to work with for this recipe. They are easy to peel and have fewer seeds. They also have a lower moisture content which means they take less time to cook down.

But sometimes you (ok, it’s me) have 18 different tomato plants that are all ripening at the same time and you need to do something with them. This slow cooker marinara is the perfect home for those random tomatoes.

If you are using tomatoes that are more suitable to sandwiches (“slicers”), you’ll want to mix them with some paste-style tomatoes for it to reduce/thicken.

tomatoes, garlic, and herbs on a wooden board

Do I Have to Peel Tomatoes To Make Sauce?

You don’t have to, but it will impact the overall texture of your finished sauce if you don’t. You can read more about it in this in-depth tutorial on How to Blanch and Peel Tomatoes.

Don’t want to take that extra step? I got you covered. Cut the tomatoes in half, push the seeds out with your thumb and then grate the tomato using a box grater, discarding the skins. It’s not foolproof as some skin will still get mixed in, but that’s ok.

If you’re a canner, check out these posts on Canning Tomatoes {Whole tomatoes} and Canning Stewed Tomatoes because both can help you make amazing homemade spaghetti sauce on the fly.

boiling and icing tomatoes for crockpot spaghetti sauce

peeling and deseeding a tomato for crockpot spaghetti sauce

crockpot spaghetti sauce in 3 steps

Pro Tips/Recipe Notes

  • I used my Instant Pot on the slow cooker function with the slow cooker lid for this recipe.
  • If you want a less chunky sauce, pulse it a few times with an immersion blender or mash it a bit with a potato masher or large spoon. Add the baking soda, salt and pepper, and additional herbs to taste.
  • Making this all day and then refrigerating it overnight gives it an extra kick of awesome in the flavor department. 
  • Try it for a dipping sauce for Air Fryer Ravioli, or use it in this Ravioli Bake. I also use 2 tbsp of it as the secret ingredient in my Whole30 Pot Roast
  • Want to up the veggie factor? Sneak in some frozen pumpkin. No one will know!
  • Feel free to add meat if you’d like. Just make sure you fully cook it before incorporating it into the sauce.

How to Freeze Spaghetti Sauce

You can freeze this sauce in a wide-mouth canning jar. Make sure to leave 1 inch of space between the top of the sauce and the top of the jar to allow for expansion during freezing.

Check out this post on Canning Supplies for my favorite sources for cheap or free canning jars.

a jar of crockpot spaghetti sauce with herbs and fresh tomatoes

More Recipes Like This

WEIGHT WATCHERS POINTS

One serving has 0 WW Freestyle SmartPoints.

a bowl of crockpot spaghetti sauce with tomatoes and herbs
Print Recipe
4.8 from 5 votes

Crockpot Spaghetti Sauce {Sugar-Free Spaghetti Sauce}

Prep Time35 mins
Cook Time7 hrs
Total Time7 hrs 35 mins
This fresh, homemade Crockpot Spaghetti Sauce is a delicious meatless sauce made from scratch. This paleo/Whole30 spaghetti sauce creates magic from fresh tomatoes and herbs.

Ingredients

  • 10 cups tomatoes roughly chopped
  • 2 tbsp fresh basil {or 2 tsp dried}
  • 1 tbsp fresh oregano {or 1 tsp dried}
  • 1 tbsp fresh parsley {or 1 tsp dried}
  • 6 cloves garlic {roughly chopped}
  • 1 cup onion {chopped}
  • 6 oz canned tomato paste {optional}
  • 1/8 tsp baking soda
  • salt and pepper to taste

Instructions

  • Rinse tomatoes and core them. Drop tomatoes in a pot of boiling water for one minute.
  • Scoop tomatoes out with a slotted spoon and place in a bowl of ice water. Now the skins will slip off easily. 
  • Cut in half (quarters for larger tomatoes) and push out the seeds out with your thumb.
  • Add the tomatoes and all the ingredients (except baking soda) to slowcooker.
  • Cook on low for 10 hours or high for 7 hours. Stir occasionally if possible. The sauce should be reduced by about half.
  • If you want a less chunky sauce, pulse it a few times with an immersion blender or mash it a bit with a potato masher or large spoon. Add the canned tomato paste at this point if you'd like a thicker sauce.
  • Add the baking soda (it will foam a bit), salt and pepper, and additional herbs to taste. 

Notes

Making this all day and then refrigerating it overnight gives it an extra kick of awesome in the flavor department.
 
You can freeze this sauce in a wide mouth canning jar. Make sure to leave 1 inch of space between the top of the sauce and the top of the jar to allow for expansion during freezing.
Nutrition Facts
Crockpot Spaghetti Sauce {Sugar-Free Spaghetti Sauce}
Amount Per Serving (0.25 cup)
Calories 25
% Daily Value*
Fat 0g0%
Saturated Fat 0g0%
Cholesterol 0mg0%
Sodium 79mg3%
Potassium 281mg8%
Carbohydrates 5g2%
Fiber 1g4%
Sugar 3g3%
Protein 1g2%
Vitamin A 785IU16%
Vitamin C 13.3mg16%
Calcium 18mg2%
Iron 0.6mg3%
* Percent Daily Values are based on a 2000 calorie diet.

 

 

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39 comments on “Crockpot Spaghetti Sauce {Vegan}”

  1. Can you can this sauce in a hot water bath instead of freezing it?

  2. I can’t stop eating this spaghetti sauce! First time spaghetti sauce for me and I can’t believe how amazing this was. It was a little watery for me but I thickened it up with a roux using flour and avocado oil (I didn’t have any tomato sauce), and it was perfect. Just amazing.5 stars

  3. Can you can this? I see it has baking soda in it. Would that make a difference with canning?

  4. Please give me an idea of how many quart jars to prepare. Got to prepare for tomato harvest! Thanks!

  5. Do I leave the top on my crockpot while cooking?

  6. The spices are added in during the 7-10 hour cooking time and not just stirred in at the end, correct?

  7. Why the baking soda?

    • There is a note about it in the post: “The secret ingredient for removing sweetness and acidity from tomato sauce is…baking soda! I know, right?”.

      I use it for tomato soup, pizza sauce, and spaghetti sauce. It’s a fun secret trick!

  8. I’ve cooked this for 6 hours on high with lid on. It hasn’t reduced hardly at all. 

  9. can you can this sauce?