Slow Cooker Tomato Sauce Recipe -
Slow Cooker Tomato Sauce Recipe
  • READY IN 10+ hrs

Slow Cooker Tomato Sauce

Recipe by  

"This tangy, zesty sauce instantly became a family favorite. I created it when my family came in from out of town; everyone raved about it and my husband begs me to make it all the time."

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Ingredients Edit and Save

Original recipe makes 6 servings Change Servings
  • PREP

    15 mins
  • COOK

    10 hrs

    10 hrs 15 mins


  1. Place tomatoes, onion, garlic, and olive oil in a slow cooker. Season with oregano, basil, cayenne pepper, salt, black pepper, and cinnamon.
  2. Cover, and cook 10 to 15 hours on Low. The longer you simmer it the more flavorful it becomes. At 10 hours it's really good, but at 15 its even better.
Kitchen-Friendly View


  • Easy Cleanup
  • Try using a liner in your slow cooker for easier cleanup.

Reviews More Reviews

Most Helpful Positive Review
Aug 08, 2011

In reading the reviews for this sauce I wanted to tell the reviewer who said that this was a base sauce and to other reviewers who were modifying the sauce. This is not a Italian base sauce, each time you correct the sauce by adding other ingredients you further complicate the taste of the sauce. In otherwords, your breaking down the original sauce. This sauce as in the original recipe is a good tangy sauce that has muliple uses. The Italian base tomato sauce is plum tomatoes, with 4 cloves garlic, blend and simmer for 30 minutes. The last 10 minutes add a whole stem of fresh basil and simmer the remaining 10 minutes. Then pull the basil out of the sauce, remove from heat and let it cool. Store for furture use. Then when you need a sauce for spaghetti, or as a sauce for meat like Chicken Parmesan or stuffed shell, you seasn the sauce to the dish. Good taste sauce, I'll use it for shell and chicken parmesan.

Most Helpful Critical Review
Nov 27, 2006

I've tried this method twice now, each time tweaking some of the ingredients to try for a better result. It just wasn't very good either time. I've had a much better result using canned tomato sauce. The flavor and consistency is just off but I can't really determine exactly what needs to be done to fix it. I used about 18 roma type tomatoes from my garden, used dry oregano and 1/2 cup of fresh chopped basil. We don't like a hot pasta sauce so I omitted the cayenne altogether and used fresh ground pepper for the flavor. In addition I added about 1/4 cup dry sherry, 2 cans of chopped portobello mushrooms, extra garlic, and 2 bay leaves. I pureed the sauce in my blender because my kids prefer a smooth sauce. The 2nd time I made it I even added in a can of tomato paste and a can of tomato sauce, hoping to richen and improve the flavor but it didn't help much. Just as a footnote this this, a trick I learned a while ago is that if the sauce tastes too acidic add 1 or 2 Tbsp. butter, mix it in and taste. Add more if needed. It should balance out the acidity. Sugar also helps reduce acidity.

Sep 23, 2005

This was so easy & tasty. My whole family loved it. I made the recipe with 40 roma tomatoes fresh from the garden, & used a banana pepper and 1 tsp. cayenne & it was still like an arabiatta sauce. (Added a bit of sugar too!)Everything else, as is! Excellent! We used it for pasta, then the next night for a spicy Chicken Parm. (I didn't seed the tomatoes & the sauce was a fresh tomato sauce from Italy...not the thick Americanized ones.) I'll use up my tons of tomatoes on this one!

Sep 07, 2006

Excellent. The flavor of this sauce is very good. The only thing I will do the next time, though, is to reduce the pepper. I like spicy recipes, but my husband does not. So I need to make it a little less spicy. I made ravioli and used this for the sauce. Very tasty and fairly easy to make.

Jun 15, 2011

I am lucky, been cooking a long time and know intuitively how to make things yummy, so I usually am able to take any recipe and make it my own AND make it 5 star! I also am lucky because in Tucson, AZ, spring is Heirloom Tomato season, so I used my own fresh 12 tomatoes from the garden. For this recipe, I used a Vidalia Sweet onion and 10 fresh garlic cloves (see photo!), all minced very fine and sauteed in 1 Tof EVOO; when they were translucent after 5-7 minutes, added diced zucchini and sauteed all another 5 minutes with lid on low. Added all to the peeled, seeded and crushed tomatoes in the slow cooker on low...and went to bed! In the A.M., the juices had cooked off; it was a very rich, thick and chunky sauce. THEN I added spices but absolutely no cayenne. Wanted to keep it strictly tomato sauce for pasta; cayenne is too weird for us, but to each their own! What I DID add was garlic powder, fresh crushed oregano and fresh basil, 1 tsp. garlic salt and 1 tsp. pepper and let it sit on low for another hour. THEN...I tasted it. NOW is the time to really hone down the flavors to make this your very own concoction, with dried herbs, spices and especially if it needs salt. Ended up adding more salt (about two teaspoons total for the recipe), granulated garlic (this is normal for me, can't have too much garlic), onion powder, dried oregano, thyme, basil and ahem, some cumin. I love how this basic recipe lets me experiment! Every time different AND zesty! Thanks, Michele!

Aug 04, 2009

Great way to use bulk tomatoes - thanks!I doubled recipe, used ~1t. red pepper flakes instead of cayenne, diced the tomatoes (didn't peel or remove seeds), added 1 T sugar, cooked for 15 hrs over night, and enjoyed a rich, mild sauce.

Jan 19, 2006

This sauce would be much better without an entire teaspoon of cayenne pepper. Oh my gosh, it was SO spicy! My family could barely eat it. I'm giving it four stars, but I'm sure the next time I make it with MUCH less ground cayenne pepper, it'll be a five-star recipe.

Feb 14, 2006

I let this cook overnight about 12 hours in total and boy does this have a kick. I've frozen the rest so we can enjoy the rest later. Will make again without doubt. Thanks.


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  • Calories
  • 105 kcal
  • 5%
  • Carbohydrates
  • 5.5 g
  • 2%
  • Cholesterol
  • 0 mg
  • 0%
  • Fat
  • 9.3 g
  • 14%
  • Fiber
  • 1.8 g
  • 7%
  • Protein
  • 1.2 g
  • 2%
  • Sodium
  • 394 mg
  • 16%

* Percent Daily Values are based on a 2,000 calorie diet.

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