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5 from 1 vote

Slow cooker tomato sauce

Who needs to stand over a bubbling pot all day, when you can make an amazing tomato sauce with practically no effort?! This slow cooker tomato sauce is easy, versatile, and full of flavour.
Prep Time5 mins
Cook Time6 hrs
Total Time6 hrs 10 mins
Course: Miscellaneous
Cuisine: Italian
Servings: 4 cups
Calories: 72kcal
Author: Becca Heyes


  • 3 x 400g tins chopped tomatoes (~ 4 cups in total)
  • 1 onion, roughly chopped (I used a red onion)
  • 5 cloves garlic, minced (or 3 tsp lazy garlic)
  • 2 tbsp tomato puree (tomato paste)
  • 1 tsp dried thyme
  • Few sprigs fresh basil, chopped
  • Salt
  • Black pepper


  • Add all the ingredients to the slow cooker, and mix to combine. Cook on high for 5-7 hours (if you're using the slow cook function of your Instant Pot, make sure the valve is set to 'venting', and slow cook with the pressure set to 'more').
  • You can either leave the sauce chunky, or blend it with a hand blender until it reaches your desired consistency. If you'd like a thicker sauce, continue to cook on high with the lid off for another hour or two.


Serving: 1cup | Calories: 72kcal | Carbohydrates: 11.8g | Protein: 1.8g | Fat: 2.2g | Saturated Fat: 0g | Cholesterol: 0mg | Sodium: 313mg | Potassium: 108mg | Fiber: 2g | Sugar: 6.5g | Calcium: 50mg | Iron: 1.4mg