Slow-Cooker Tomato Sauce

Recipe for Slow-Cooker Tomato Sauce


4 tablespoons olive oil
1 small yellow onion, peeled and finely sliced
3 cloves garlic, peeled and minced
3 pounds (about 20 medium) fresh plum tomatoes, cored, peeled, seeded, and pureed (enough to yield 4 cups)
1/4 cup minced fresh parsley, or 1 tablespoon dried
3 tablespoons minced fresh basil, or 1 teaspoon dried
1 tablespoon minced fresh oregano, or 1 teaspoon dried
salt and pepper, to taste


Turn the slow-cooker on high, let it heat for 5 minutes, and add olive oil, onion, and garlic. Stir and cover. (The pot won’t get hot enough to brown them.) Cook for 1 hour, or until onion is soft and wilted. Uncover and add tomatoes, parsley, basil, oregano, salt, and pepper. Reduce the heat to low, and stir. Cook with the cover off for approximately 4 hours. The sauce is done when it is thick and not watery.


4 cups

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Slow cooker tomato sauce

Can this be canned in a hot water bath instead of frozen to keep longer?


The Editors's picture

Yes, you can can this sauce!

Tomato sauce

sounds so good. Can slow cooker sauce be frozen for later? Thanks for your reply.

freeze your tomato sauce

The Editors's picture

Yes, Kathy. Absolutely.

Slow cooker tomato sauce

Why couldn't you "can" it afterwards?
Like a hot water bath to seal?
Please let me know.


Can you freeze the sauce for later.

freezing tomato sauce

The Editors's picture

Yes, Jamie. Absolutely.

Was hoping to read and review

Was hoping to read and review the recipe for Indian Pudding. Got a recipe for Tomato Sauce, instead.


Wanda, We apologize. Here is

The Editors's picture

Wanda, We apologize. Here is the link for Indian Pudding:

Definitely doing this when my

Definitely doing this when my tomatoes come in. So tired of paying high prices for foods I can do myself with better quality (non-chemical or gmo).

There are no gmo ingredients

There are no gmo ingredients in this recipe that I see. Pick up a bushel of tomatoes from your local farmers if you don't grow them yourself. Tomato season is just about over here in New York.