A jar of plum butter is set next to fresh plums.
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Plum Butter

With its deep blue-purple color and slightly tart taste, your family and friends are going to love this slow cooker plum butter!
Course Preserves
Cuisine American
Keyword how to make plum butter, Italian prune plums, plum butter
Prep Time 15 minutes
Cook Time 12 hours
Total Time 12 hours 15 minutes
Servings 48 tablespoons
Calories 27kcal
Author Maria Vannelli RD

Ingredients

  • 4 pounds prune plums sliced in half, pit removed
  • 1-2 tablespoons brown sugar

VARIATION 1:

  • 1/2 vanilla bean seeds scraped
  • 3 strips orange peel

VARIATION 2:

  • 1/2 vanilla bean seeds scraped
  • 1/2 teaspoon almond extract

VARIATION 3:

  • 4-6 apples peeled and chopped
  • 1/4 teaspoon nutmeg

VARIATION 4:

  • 4-6 pears peeled and chopped
  • 1/2 vanilla bean seeds scraped
  • 3 strips orange peel

Instructions

  • Preheat oven to 350°F.
  • Line a large baking sheet with parchment paper.
  • Spread the pitless prune plums evenly on the parchment lined baking sheet.
  • Sprinkle the prunes with about 1-2 tablespoons of brown sugar.
  • Bake for about 30-40 minutes or until the skins can easily be removed.

VARIATION 1:

  • Transfer the prunes, WITHOUT the skins and all the juices to a slow cooker with the addition of the vanilla bean and orange peel.

VARIATION 2:

  • Transfer the prunes, WITH the skins, and all the juices to a slow cooker with the addition of the vanilla bean. Add 1/2 teaspoon of almond extract at the end of the cooking time.

VARIATION 3:

  • Transfer the prunes (either with or without their skins) and all the juices to a slow cooker with the addition of the apples. Add 1/4 teaspoon of nutmeg at the end of the cooking time.

VARIATION 4:

  • Transfer the prunes (either with or without their skins) and all the juices to a slow cooker with the addition of the pears, vanilla bean and orange peel. 

The Slow Cooker Method:

  • Once you have decided on one of the variations, set the slow cooker on high for about 2 hours.
  • Remove the vanilla bean and orange peel, if applicable.
  • With an immersion blender, puree the softened prunes until smooth. 
  • Set the slow cooker on low and cook for an additional 8-10 hours. Total time will depend on total moisture of pureed fruit. The plum butter is done when there is no liquid that seeps out when a teaspoon of the fruit is placed on a dish. 
  • OPTIONAL: Can use a few tablespoons of maple syrup or honey to sweeten the plum butter. Can also use a squirt of lemon juice to even out the flavors.
  • Ladle the plum butter in sterilized jars and process accordingly.

Notes

Please keep in mind that the nutritional information provided below is just a rough estimate and variations can occur depending on the specific ingredients used. 
Total Yield: 3 half pint jars or 3 cups
Each serving is equivalent to 1 tablespoon

Nutrition

Serving: 1tablespoon | Calories: 27kcal | Carbohydrates: 6g | Potassium: 76mg | Fiber: 1g | Sugar: 5g | Vitamin A: 135IU | Vitamin C: 4.4mg | Calcium: 4mg | Iron: 0.1mg