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tomato sauce in slow cooker

The BEST Crockpot Tomato Marinara Sauce

This is the BEST EVER Crockpot Tomato Sauce! It's easy to make marinara sauce in your slow cooker, the perfect homemade spaghetti sauce recipe for any dinner.
Course Main Course
Cuisine American
Keyword tomato sauce
Prep Time 20 minutes
Cook Time 10 hours
Total Time 10 hours 20 minutes
Servings 10 cups
Calories 53kcal
Cost $8


  • 1 stalk celery
  • 1 medium yellow onion peeled
  • 1 medium carrot peeled
  • 4 cloves garlic peeled
  • 2 28 ounce cans crushed tomatoes
  • 6 ounces tomato paste
  • 2 cups chicken stock or water
  • 2 tablespoons honey
  • 2 bay leaves
  • 1 teaspoon Kosher salt
  • 1/2 teaspoon ground pepper
  • 1/2 teaspoon dried basil
  • 1/2 teaspoon dried oregano
  • 1/2 teaspoon dried thyme
  • 1/4 teaspoon red pepper flakes


  • Place celery, onion, carrot, and garlic in a food processor and chop until fine. Heat 1 tablespoon olive oil in a small skillet over medium heat and cook the vegetables for about 5 minutes, or until tender. Remove from heat and place in a 5-7 quart crockpot insert.
  • Add the crushed tomatoes, tomato paste, chicken stock or water, honey, and all spices to the crockpot insert. Stir to combine. Cover and cook on low heat 8-10 hours.
  • Before serving, taste and add additional salt or pepper as desired.
  • Store in refrigerator for up to 3 days or freeze for up to one month.



Serving: 1/16th recipe | Calories: 53kcal | Carbohydrates: 12g | Protein: 3g | Sodium: 142mg | Fiber: 3g | Sugar: 8g