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easy homemade ketchup in a glass bottle
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4.50 from 2 votes

Homemade Ketchup (Slow Cooker Recipe)

This homemade ketchup is a slow cooker recipe that puts all store bought ketchups to shame! You'll be surprised by how easy it is to make your own ketchup right at home and how delicious the results are.
Prep Time15 minutes
Cook Time10 hours
Total Time10 hours 15 minutes
Course: Condiment, Dip, Sauce
Cuisine: American
Servings: 3 cups
Calories: 298kcal

Ingredients

  • 4 lbs roma tomatoes (aka paste tomatoes) stems removed & quartered
  • 2/3 cup granulated sugar
  • 3/4 cup white vinegar
  • 1 tsp onion powder
  • 1/2 tsp garlic powder
  • 1/8 tsp celery salt
  • 1/8 tsp ground mustard
  • 1/4 tsp finely ground black pepper
  • 1/4 tsp cayenne pepper
  • 1 whole clove
  • pinch salt

Instructions

  • Add the tomatoes to a high speed blender- working in batches, if necessary- and puree until smooth.
  • Pour the blended tomatoes into the crock of your slow cooker. Add the remaining ingredients and stir together to combine.
  • Cook on HIGH, uncovered, for 10-12 hours- until the ketchup has reduced by half and thickened.
  • Use an immersion blender to blend the mixture in the crockpot until completely smooth.
  • Let the ketchup cool completely, then bottle and refrigerate.
  • Serve chilled and enjoy!

Notes

  • Tomatoes should be added to the blender AS IS- that means peels, seeds, and all.
  • You can be make this in a heavy bottomed pot on the stove top, if preferred. Again, cook until the mixture's thickened and reduced by half in volume.
  • Feel free to adjust the spices to your liking.

Nutrition

Calories: 298kcal | Carbohydrates: 69g | Protein: 6g | Fat: 1g | Saturated Fat: 0.2g | Polyunsaturated Fat: 1g | Monounsaturated Fat: 0.2g | Sodium: 131mg | Potassium: 1458mg | Fiber: 8g | Sugar: 60g | Vitamin A: 5109IU | Vitamin C: 83mg | Calcium: 71mg | Iron: 2mg