Thick and Rich Slow Cooker Tomato Sauce simmered low and slow for 8 hours! An easy make ahead meal that makes tons of leftovers!
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Slow Cooker Tomato Sauce
There’s nothing like slow cooked pasta sauce that’s been simmering all day. This homemade spaghetti sauce is loaded with spicy Italian sausage, fire roasted tomatoes and crushed tomatoes. The sauce is simmered low and slow for 8 hours! The sauce gets super thick, rich and loaded with flavor. Cooking the tomato sauce for a long period of time helps to bring out the sweetness in the tomatoes. This really is the best homemade tomato sauce!
Ingredients
- Italian Sausage: Hot Italian sausage gives the marinara some spice and a lot of flavor. You can use mild Italian sausage or even ground pork as well!
- Onions and garlic: Add so much flavor to the sauce.
- Tomato Paste: Helps to thicken up the marinara sauce.
- Fire Roasted Tomatoes: I use both fire roasted tomatoes and crushed tomatoes. The fire roasted adds lots of flavor and chunks to the spaghetti sauce.
- Herbs: Crushed red pepper flakes, oregano, salt, pepper, bay leaves and Italian seasoning.
How to make Slow Cooker Tomato Sauce
- Brown sausage: Add sausage to a medium skillet and cook until browned. (It does not need to be cooked through, just browned on the outside for extra flavor. You can skip this step if you do not have time.)
- Cook: Add browned sausage, along with the rest of the ingredients to a slow cooker. Cook sauce on low for 8 hours.
- Serve: Over pasta with fresh basil and grated parmesan cheese for serving, if desired.
Frequently Asked Questions
Can you freeze this sauce?
Yes! This crockpot tomato sauce freezes really well. Simply store in an airtight container or ziplock bag. Store in the freezer for up to 3 months!
Can I make this on the stove top?
If you are short on time you can make this sauce on the stove top in less than 30 minutes! Simply brown the sausage then add the tomatoes and spices and simmer for 15-20 minutes. When I am making spaghetti sauce on the stove top I like to add a bit of sugar to mimic the sweetness of cooking the tomatoes all day.
Variations
- Vegetarian: To make this dish vegetarian simply omit the meat!
- Add more veggies: To make this dish healthier try adding chopped carrots, celery or bell peppers!
- Different protein: Ground beef or chuck can be added to make a ragu! Both would do really well cooked for a long time over low heat.
- Add more heat: If you like your marinara sauce on the spicier side add in some more crushed red pepper flakes.
- Make it creamy: To make a blush sauce add a couple splashes of heavy cream right before serving.
Ways to use this Slow Cooker Tomato Sauce
Here are some more Slow Cooker Recipes to try!
- Slow Cooker Pulled Pork Barbecue Sandwiches
- Slow Cooker French Dip Sandwiches
- Slow Cooker Honey Garlic Chicken
- Slow Cooker Honey Sriracha Chicken
- Easy Slow Cooker Mexican Chicken
Slow Cooker Tomato Sauce
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Ingredients
- 1 tbsp olive oil
- 16 ounces sausage, I used hot sausage
- 1 large onion, diced
- 5 cloves garlic, minced
- 1 6 ounce can tomato paste
- 1 14.5 ounce can fire roasted tomatoes
- 2 28 ounce cans crushed tomatoes
- 1/2 tsp crushed red pepper flakes
- 2 sprigs fresh oregano
- 2 whole bay leaves
- 1/2 tsp Italian seasoning
- 1/2 tsp salt
- 1/2 tsp pepper
- fresh basil for serving, if desired
- fresh parmesan cheese for serving, if desired
Instructions
- Heat olive oil a large skillet over high heat.Add sausage and onions and cook until browned. (It does not need to be cooked through, just browned on the outside for extra flavor. You can skip this step if you do not have time.)Add in garlic and cook for 1-2 more minutes.
- Add browned sausage, along with the rest of the ingredients to a slow cooker.
- Cook sauce on low for 8 hours.Serve over pasta with basil and parmesan cheese for serving, if desired.
Nutrition Information
Did You Make This?
I’d love to hear your feedback! Leave a review and make sure to share your pictures on social media! Don’t forget to follow @thechefsavvy.
Patty Casey
This was amazing. I did make adjustments- added minced sweet onion, red pepper flakes, and more garlic increased amount of Italian seasoning and oregano because that is how I usually make the sauce on the stove. And I let it cook for 10 hours. What an easy method! And no need to clean up the sauce spatters on the stove.
Kelley Simmons
So glad you enjoyed this tomato sauce Patty! I love the easy clean up / no splatters as well!
Tami
how do i adjust this using fresh garden tomatoes?
Nathan
Hi Tami,
To use fresh tomatoes:
1.Pick 5 Lbs.
2.Start by cutting a small x in the bottom of each tomato Then place tomatoes into boiling water for one minute, transfer tomatoes to ice bath, skin should peel off easily
3.Cut each peeled tomato in half, squeeze out some of the seeds
4.Place in blender and pulse a few times to crush up tomatoes.
5.Use in place of the fire roasted, as well as the crushed tomatoes in recipe.
I hope this is helpful! Thank you for your comment! I hope you enjoy!
Nathan
Melissann
Made this with hot Italian sausage links and ground that and the fire roasted tomatoes in a blender bc we don’t like chunks of either. Turns out it’s an amazing base recipe and you can add other spices, etc to taste. I cook minced garlic in a skillet with garlic before blending. I also do about a tsp each of garlic and onion powder. I find that doubling the other spices and adding some chicken bouillon and sugar (depending on bitterness of the crushed tomatoes) results in the best sauce. Thanks for the recipe!
Joanne Bewley
I’m cooking this recipe as I type. After 40 years of cooktop sauce I thought it was time to modernise. One thing I had to adjust was the lack of garlic. I just can’t make red sauce without it. One large clove, minced and added to browning sausage about a minute before it was ready for the pot. Also, since I’m retired, I’m going to cook it on high and check it at 4 hours.
CWH
Just gotta have garlic!!!!
Annamaria Christensen
Instead of sausage can I brown meatballs and add them?
Kelley
Of course!!
Pam
Made this yesterday. I sautéed an onion and mushrooms and added them about 2 hours in. Sauce was delicious!
Hap
Do you chop the sausage, or just put that browned links in the cooker? I am guessing they crumble into pieces after cooking in the sauce that long? Also, can the sausage be omitted?
Kelley
Hi Hap!
Yes the sausage can be omitted from the sauce. I use ground sausage and stir it around so no need to cut it up.
Thanks!
Kelley