Safety classification
Insufficient information
Testing authority: Traditional Polish source
Safety reviewed: 09/20/2026
Processing details
Altitude adjustment: No shelf-stable schedule should be inferred beyond the source qualification and safety warning.
Safety classification
Insufficient information
Testing authority: Traditional Polish source
Safety reviewed: 09/20/2026
Processing details
Altitude adjustment: No shelf-stable schedule should be inferred beyond the source qualification and safety warning.
Publisher source
Preparation timeline
- Wash, halve, and pit the plums. Place them in a heavy-bottomed saucepan.
- Cook uncovered over low heat, stirring regularly, until the fruit collapses and reduces to a very thick, dark plum butter, about 90 minutes or longer depending on moisture.
- Taste near the end and add a small amount of sugar only if needed; add cinnamon if desired. Continue cooking until fully dissolved and thick.
- Transfer the hot plum butter to clean heat-safe jars and cool.
- Because this traditional source does not provide a validated filled-jar processing schedule, refrigerate promptly or freeze with suitable expansion headspace. Do not store this version at room temperature.
Equipment
- Heavy-bottomed saucepan
- Heat-safe jars
- Wooden spoon
Visual method guide
- Prepare: Wash, halve, and pit the plums. Place them in a heavy-bottomed saucepan.
- Combine or cook: Cook uncovered over low heat, stirring regularly, until the fruit collapses and reduces to a very thick, dark plum butter, about 90 minutes or longer depending on moisture.
- Fill: Taste near the end and add a small amount of sugar only if needed; add cinnamon if desired. Continue cooking until fully dissolved and thick.
- Process: Transfer the hot plum butter to clean heat-safe jars and cool.
Safety summary
Traditional Polish powidła śliwkowe , a thick plum butter made by slowly reducing ripe prune plums without added pectin.
⚠️ Safety classification: traditional/incomplete for shelf-stable home
Safe adaptation: Refrigerate promptly or freeze with suitable expansion headspace. For shelf-stable storage, use a research-tested plum jam or fruit-butter recipe and follow its exact jar size, headspace, processing time, and altitude adjustment.
UNSAFE — DO NOT USE AS WRITTEN. No validated filled-jar process; refrigerate or freeze.
Treat this as a refrigerated or frozen preparation, or replace it with a complete tested shelf-stable formula.
Do not infer a
When a validated process is absent, cool promptly and refrigerate or freeze; do not store at room temperature.
Editorial review: Safety classification and source limitations were reviewed. Re-review after any source or recipe change.
About this recipe
Traditional Polish plum butter made by slowly reducing ripe prune plums without added pectin.
Before you begin
- Method
- Boiling-water
canning - Headspace
- Use the recipe-card headspace
- Recipe standard
- Use the complete formula and directions in the recipe card.
Safety classification
Insufficient information
Testing authority: Traditional Polish source
Safety reviewed: 09/20/2026
Processing details
Altitude adjustment: No shelf-stable schedule should be inferred beyond the source qualification and safety warning.
Powidła Śliwkowe — Polish Plum Butter
Ingredients
- 15 ripe prune plums washed, halved, and pitted
- sugar optional, only if the plums are not sufficiently sweet
- ground cinnamon optional, to taste
Equipment
- Heat-safe jars clean, with lids
Directions
- Wash, halve, and pit the plums. Place them in a heavy-bottomed saucepan.
- Cook uncovered over low heat, stirring regularly, until the fruit collapses and reduces to a very thick, dark plum butter, about 90 minutes or longer depending on moisture.
- Taste near the end and add a small amount of sugar only if needed; add cinnamon if desired. Continue cooking until fully dissolved and thick.
- Transfer the hot plum butter to clean heat-safe jars and cool.
- Because this traditional source does not provide a validated filled-jar processing schedule, refrigerate promptly or freeze with suitable expansion headspace. Do not store this version at room temperature.
Recipe Notes
Private Notes
Questions or results?
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Share your results how it turned out.Serving suggestions
After opening, refrigerate the product and use it in ways appropriate to this recipe.
Frequently asked questions
Can I change the recipe?
Do not change safety-critical proportions, jar size, headspace,
What if a jar does not seal?
Follow the cited source’s directions for an unsealed jar; refrigerate promptly when required.
Comparison and context
Traditional Polish plum butter made by slowly reducing ripe prune plums without added pectin.
Troubleshooting
Because this traditional source does not provide a validated filled-jar processing schedule, refrigerate promptly or freeze with suitable expansion headspace. Do not store this version at room temperature.
Source & provenance
Garden planning for this recipe
Plant, space, variety, zone, and timing estimates live on dedicated ingredient pages:
Typical canning season
Season: Summer, Fall
Months: August, September, October
How much of the main ingredient should I grow?
Not calculated for an unsafe or untested method
This recipe does not have a reliable garden conversion. Plan a purchase or harvest separately, and do not use garden estimates to alter the tested recipe.
Garden yields vary by cultivar, climate, soil, pests, and care. Always measure the exact prepared ingredient amount required by the tested canning recipe.