Slow Cooker Spaghetti Sauce
I’ve made a few variations of pasta sauce over the years, but this Slow Cooker Spaghetti Sauce is definitely one of my favorites. The long slow simmer caramelizes the sugars in the tomatoes and creates a depth of flavor that can’t be matched. Plus, what more could you ask for than to just throw some ingredients in a pot, forget about it for 8 hours, and then come back to a rich, delicious homemade sauce? Then you can divide the sauce into portions, freeze, and you’ll have delicious homemade pasta sauce on hand for quick busy weeknight dinners.
Originally posted on 11/4/2011, updated 1/12/2022.
Why make Homemade Spaghetti Sauce?
Pasta sauce can be bought premade really cheaply, so I think in a lot of cases it does make sense to just buy a jar and go with it. But if you want to have a little more control over the quality and ingredients of your pasta sauce while still keeping costs low, this Slow Cooker Spaghetti Sauce is a great option.
What Size Slow Cooker to Use
This recipe makes about 2 quarts of sauce, so I would suggest using a 3 quart or larger slow cooker. You don’t need anything fancy, just a very basic slow cooker with basic functions like warm, low, and high. I do find that slow cookers made with a thick ceramic insert (or “crock”) cook much more evenly than metal inserts, like you’d have when using the slow cooker function on an Instant Pot.
Why Add Balsamic Vinegar?
The balsamic vinegar in this recipe adds a subtle depth and brightness to the sauce. It can seem strong at first, but it mellows out as the sauce is cooked. If you’re not a fan of balsamic vinegar or just don’t have any on hand, this recipe will still make a really amazing sauce even if you leave it out.
Can I Add Meat?
I’ve tried this sauce before with ground beef and I found the cook time to be far too long for the ground beef, so if you do want to add meat I suggest browning it separately and then just stirring it into the sauce after cooking. You can also check out my quick Weeknight Pasta Sauce for an easy and flavorful meat sauce option.
How to Freeze Pasta Sauce
This recipe makes about 7 cups. I suggest dividing the sauce into two or three cup portions before freezing so you can take out just enough for one recipe at a time to thaw. Let the spaghetti sauce cool completely in the fridge, then transfer to freezer-safe containers to freeze. The sauce will stay good in the freezer for about three months, but this can vary depending on the conditions in your freezer. If you use quart-sized freezer bags and freeze them laying flat they stack nicely in the freezer without taking up much space.
You can thaw the sauce in the refrigerator overnight or just cut the bag away from the frozen sauce, place it in a saucepot, and heat over medium-low until it’s heated through (stir occasionally).
This sauce goes great with Homemade Meatballs (also freezer-friendly)!
Slow Cooker Spaghetti Sauce
Ingredients
- 1 yellow onion ($0.32)
- 4 cloves garlic ($0.32)
- 2 28oz. cans crushed tomatoes ($2.00)
- 1 6oz. can tomato paste ($0.69)
- 1 Tbsp dried basil ($0.30)
- 1.5 tsp dried oregano ($0.15)
- 1 Tbsp brown sugar ($0.03)
- 1 Tbsp balsamic vinegar ($0.14)
- 4 Tbsp butter ($0.40)
- 1 tsp salt (or to taste) ($0.05)
Instructions
- Dice the onion and mince the garlic. Place both in a 3 quart or larger slow cooker.
- Add the crushed tomatoes, tomato paste, basil, oregano, brown sugar, balsamic vinegar, and butter to the slow cooker. Stir everything together well.
- Place the lid on the slow cooker and cook on high for four hours or low for eight hours.
- After cooking, give it a good stir, then add salt to taste. Start with just ½ tsp of salt and add more if needed (I added 1 tsp). Use the sauce immediately, refrigerate, or freeze for later.
Nutrition
Equipment
How to Make Slow Cooker Spaghetti Sauce – Step By Step Photos
Dice one yellow onion and mince four cloves of garlic. Add both to a 3 quart or larger slow cooker.
Add 2 28oz. cans of crushed tomatoes and one 6oz. can of tomato paste to the slow cooker.
Also add 1 Tbsp dried basil, 1.5 tsp dried oregano, 1 Tbsp brown sugar, 1 Tbsp balsamic vinegar, and 4 Tbsp butter to the slow cooker.
Give the ingredients a good stir until they’re evenly incorporated.
Place the lid on the slow cooker and cook on high for four hours or low for eight hours. After cooking, it will look a little like the photo above (the white is just the milk fats from the butter). Give it a good stir.
Add salt to the sauce to taste. Start with ½ teaspoon and add more until the flavors pop. I ended up using one teaspoon total.
Use the slow cooker spaghetti sauce immediately or refrigerate then freeze for long-term storage.
My new go-to sauce! This is super easy and super delicious!!
Could I substitute fresh tomatoes for the canned diced ones? If so, how many would you recommend? (I’m looking for a recipe to make sauce out of the garden tomatoes this summer.)
Fresh tomatoes are quite different than canned tomatoes so I’d really need to test them in this recipe to know how it would alter the outcome and whether any other changes would need to be made to compensate.
Hi from Québec city, Canada!
If I don’t have a slow cooker , can I do this recipe on the stove or in the oven? If yes, what would be the cooking time? And and would I have to put more liquid in the sauce like water or chicken stock?
Thanks:)
Hi Joannie, you can definitely make pasta sauce on the stove top, but unfortunately, I’d need to test this particular recipe before offering specific advice for cook time or if any extra liquid would be needed. :)
I make a similar recipe to this on the stove and just let the sauce simmer for 5-15 minutes or until it gets the right thickness (which is subjective). Stir it pretty often because tomatoes have a tendency to build air bubbles that pop and make a mess.
This is my go to sauce now! I have always made a sauce to put on the stove and simmer for hours, with more ingredients as well. But this has more flavor and is so much simpler! Love that I can leave it in the crock pot and not have to babysit it.
First time making this incredible sauce and believe me won’t be the last! WOW! It had so much depth and the caramelization of veggies made it rich. The only thing I wish is I had come across the recipe much earlier in life… I don’t know if I will buy store bought again. I have been telling family and friends of this find. Thank you! The only change I did was included more veggies two carrots shredded and finely minced celery.. always good to throw in hidden veggies!
Could I mix diced tomatoes with crushed to have a chunkier sauce?
Yes :)
Thanks
Can you can the sauce
Is the original recipe still available anywhere?
Yes, we always keep copies of recipes that are removed or changed. I’ll email it to the address you used to register this comment. The only difference is no bay leaf and I added butter.