Slow Cooker Marinara Sauce Recipe
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5 from 4 votes

Slow Cooker Marinara Sauce

Easy Homemade Marinara Sauce made in a slow cooker.
Prep Time10 mins
Cook Time8 hrs
Total Time8 hrs 10 mins
Course: Entree
Cuisine: Italian
Servings: 21 cups
Author: Patti from


  • 2 tablespoons olive oil extra virgin
  • 2 medium onions chopped
  • 6-7 cloves garlic minced
  • 4 tablespoons dried oregano
  • 2 cups chicken broth (or vegetable broth for a vegetarian and vegan alternative)
  • 4 28 ounce cans whole tomatoes
  • 4 15 ounce cans tomato sauce
  • 3 6 ounce cans tomato paste
  • 5 bay leaves
  • salt and pepper to taste


  • Heat olive oil in a large skillet over medium heat, add onions and saute until translucent, about 10 minutes.
  • Add garlic and cook an additional 5 minutes.
  • Add tomato paste, oregano and broth or water; cook an additional 30 minutes.
  • While the onion mixture is cooking, place whole tomatoes in your slow cooker, crushing tomatoes with back of wooden spoon. Add cans of tomato sauce and bay leaves to slow cooker.
  • Once onion mixture is ready, add to slow cooker and stir to combine.
  • Cook on high for 7-8 hours.


This recipe is for a 8 quart slow cooker. If your slow cooker is a different size, you will need to modify the recipe accordingly.