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Frozen pumpkin purée

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Cooked pumpkin mashed, cooled and frozen in portions: a plain base for pies, soups and baking without canning a dense purée.

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Frozen pumpkin purée on a warm ivory background.

The preserve

Freezing is the most straightforward long-term home method for pumpkin puree. It turns a large pumpkin into useful measured portions without requiring the extra sugar, vinegar or spices of a finished preserve. It is especially useful for a watery carving variety whose flesh is less appealing in cubes. Freezing does not improve poor flavour, so start with sound produce and assess the flesh before processing an entire batch.

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Ingredients and equipment

Choose the amount by your freezer's capacity to freeze it promptly, not by the capacity of the largest stockpot in the kitchen. Avoid placing a huge quantity of warm puree into a freezer already full of frozen food.

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Keeping and using

NCHFP gives a general best-quality window of 8–12 months for properly prepared frozen fruit and vegetables held at −18°C or colder. Iowa State gives approximately six months to a year for pumpkin puree. These describe quality under continuous frozen storage, not a guarantee after a power failure or repeated thawing.

Thaw in the refrigerator. In a UK household, use thawed food within 24 hours of complete defrosting, following the Food Standards Agency's general guidance. A package sized for one use makes this easier than repeatedly thawing a large tub.

Why not can this puree instead?.

The pressure-canning times for pumpkin cubes do not apply to puree. NCHFP explains that puree consistency varies enough to change how heat reaches the centre of the jar; a home-canning process has not been established for the range of products. Adding a little lemon juice does not supply the missing heat-penetration study. Freeze the puree, or can pumpkin using the separate validated cube method and puree it only after opening.

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History

The selected method appears in the University of Georgia’s So Easy to Preserve, sixth edition (2014).

Ingredients

Scaling: source batch only

Pumpkin
Amount not stated
Any manageable quantity of sound, edible pumpkin or mature winter squash.

Method

Risks and precautions · Standard risk
Spoilage during storage

Keep the purée frozen; do not use the pumpkin-cube canning schedule for mash.

Hazard source

Keep the purée frozen; do not use the pumpkin-cube canning schedule for mash.

Control source

Keep the purée frozen; do not use the pumpkin-cube canning schedule for mash.

  1. Wash the outside before cutting. Cut the pumpkin into manageable sections and remove the seed cavity. Reserve clean seeds for a separate drying batch.
  2. Cook until the flesh is soft. The NCHFP permits boiling, steaming, pressure cooking or oven cooking. Different varieties and section sizes need different times, so use tenderness as the endpoint rather than a universal number of minutes.
  3. Separate the cooked flesh from the rind and mash or blend. Keep it plain at this stage so that a portion can later become a sweet preserve, a fermented condiment or another preparation without a pre-existing spice profile.
  4. Cool quickly. Place the pan of puree in cold or iced water and stir, keeping cooling water out of the food. Divide a large batch into shallow containers. UK Food Standards Agency guidance is to cool cooked food and refrigerate or freeze it within one to two hours.
  5. Pack into small freezer-safe containers with about 1.3 cm (½ inch) headspace, or flatten portions in freezer bags and expel excess air. Label with the date, weight or volume, variety if known, and the word “plain”.
  6. Freeze promptly at −18°C or colder. Leave space around newly added packages for cold air to circulate; stack them after they have frozen solid.

Conditions

Temperature controlRefrigerated

Places

Unknown

Relationship not established · Place not established

The selected method does not establish its geographical origin.

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Related

What to make with it

  • Spiced pumpkin leather

    Cooked pumpkin blended with honey, cinnamon, nutmeg and cloves, spread thinly and dried into a rollable sheet.

Equipment

  • Blender: countertop, personal and immersion forms

    A food blender uses motor-driven blades to purée, emulsify, grind or disperse ingredients in a jar or directly in a pot. Countertop, personal and immersion forms differ in vessel and limits; food processors remain a separate tool family.

  • Food thermometer and refrigerator thermometer

    A food probe measures the temperature inside food at the probe tip; a refrigerator thermometer measures the cold storage environment. They answer different questions and cannot establish acidity or validate a preservation process.

  • Freezer

    A household freezer holds food in a frozen state for storage and selected texture or separation work; its batch-storage role differs from industrial equipment that freezes individual pieces separately.

  • Refrigerator used as a produce store

    An ordinary household refrigerator used to store selected fresh produce in vented crates or drawers, at low temperature and at a humidity chosen by the drawer. Not every crop benefits from cold.

  • Steamer

    A steamer cooks food above heated water under a cover. The broad term includes improvised pot-and-rack setups, metal tiers and basket steamers; individual forms have different designs and uses.

Read more

  • After Halloween: how the world saves its pumpkins

    A full harvest-to-pantry guide to keeping pumpkins whole, drying and freezing them, and making pickles and sweet preserves around the world—with the exact distinction between tested canning and cold storage.

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