Homemade Ketchup

Chef John's homemade ketchup is easy to make in a slow cooker with crushed tomatoes and spices. It's tasty and thick and practically cooks itself.
Prep Time 10 minutes
Cook Time 12 minutes
Total Time 12 minutes
Servings: 48 servings
Course: Condiment
Cuisine: American
Calories: 16

Ingredients
  

Ingredients
  • 2 28 ounce cans crushed tomatoes
  • 0.5 cup water, divided
  • 0.66666668653488 cup white sugar
  • 0.75 cup distilled white vinegar
  • 1 teaspoon onion powder
  • 0.5 teaspoon garlic powder
  • 1.75 teaspoons salt
  • 0.125 teaspoon celery salt
  • 0.125 teaspoon mustard powder
  • 0.25 teaspoon finely ground black pepper
  • 1/4 teaspoon cayenne pepper, or to taste
  • 1 whole clove

Method
 

  1. Pour crushed tomatoes into slow cooker. Swirl 1/4 cup water in each emptied can and pour into the slow cooker. Add sugar, vinegar, onion powder, garlic powder, salt, celery salt, mustard powder, black pepper, cayenne pepper, and whole clove; whisk to combine.
  2. Cook on High, uncovered, until mixture is reduced by half and very thick, 10 to 12 hours. Stir every hour or so.
  3. Use an immersion blender for about 20 seconds to smooth the texture of the ketchup.
  4. Ladle ketchup into a fine strainer and press mixture with the back of a ladle to strain out any skins and seeds.
  5. Transfer strained ketchup to a bowl. Cool completely.
  6. Taste and adjust salt, black pepper, and cayenne pepper as desired.

Nutrition

Calories: 16kcalCarbohydrates: 4gProtein: 1gSodium: 139mgSugar: 3g

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