Traditional Plum Preserves and Hungarian Plum Jam
A mature plum tree can produce more fruit than can be eaten fresh, particularly when several trees ripen within a short period. Fortunately, plums are among the most versatile fruits for preserving.
They can be frozen, dried, bottled using a tested method, cooked into compote, combined with spices in chutney or transformed into jam. One of the most distinctive methods is the traditional Hungarian plum preserve known as szilvalekvár: a dark, dense fruit spread made by slowly concentrating ripe plums, often without adding sugar.
Sort Plums Before Preserving
Sort the fruit as soon as possible after harvesting.
Eat Fresh
Keep the best firm, ripe plums for fresh eating. Different varieties vary greatly in sweetness, acidity, juiciness and how easily the stone separates from the flesh.
Preserve
Choose sound, fully ripe plums for jam, freezing, drying and compote. Fruit at full ripeness provides the strongest flavour and natural sweetness.
Use First
Set aside fruit that is:
Very soft.
Slightly bruised.
Split.
Damaged during picking.
Overripe but not spoiled.
Trim minor damage and cook the remaining sound flesh promptly.
Discard
Discard plums showing:
Mould.
Extensive brown or fermented flesh.
An unpleasant smell.
Insect contamination extending through the fruit.
Wet or spreading decay.
Spoiled fruit should not be hidden in a large batch of jam. Its flavour and condition can affect the entire preserve.
Wash and Stone Plums
Wash plums under clean running water immediately before preparation.
Cut each fruit open and remove the stone. Even when using a variety whose stones usually separate easily, inspect every fruit. This allows hidden damage, insects and internal decay to be found before the fruit enters the pan.
Counted batches can reduce the chance of leaving a stone behind, but each plum should still be checked individually.
Plum stones should not be cracked or added to the preserve for flavouring.
Freeze Plums
Freezing is one of the simplest ways to save a harvest until there is more time for cooking.
Wash, halve and stone the fruit. The plums can be frozen as halves, slices or a rough pulp.
To keep individual pieces separate, arrange them in a single layer on trays and freeze until firm. Transfer the frozen pieces to suitable freezer bags or containers.
For jam, compote or sauce, pack the prepared fruit in weighed portions. Label each package with the weight and intended use.
Frozen plums soften as they thaw, but they remain suitable for:
Jam.
Compote.
Sauces.
Chutney.
Baking.
Smoothies.
Desserts.
Slow-cooked plum preserve.
Freeze ripe fruit while its flavour is good rather than waiting until it begins to deteriorate.
Dry Plums
Plums can be dried into a compact, intensely flavoured ingredient.
Choose ripe, sound fruit. Wash, halve and remove the stones. Large plums may need to be cut into smaller pieces so that they dry evenly.
Use a food dehydrator or another controlled method suitable for drying fruit. Follow current guidance for preparation, temperature and conditioning.
The fruit must be dried sufficiently before it is packed. Pieces should be checked for internal moisture, particularly when they are thick.
Cool dried plums completely before placing them in clean, dry containers. Check the containers during the first days of storage. Condensation indicates that the fruit requires further drying.
Dried plums can be eaten as they are or used in:
Porridge.
Baking.
Fruit breads.
Sauces.
Stuffings.
Stews.
Compotes.
Chutneys.
Further information on drying and conditioning fruit can be found in the Harvesting & Storage section.
Make a Simple Plum Compote
Compote keeps more of the fruit’s shape and freshness than a thick jam.
Place stoned plums in a saucepan with a small amount of water. Cook them gently until they begin to soften and release their juice.
Sugar can be added according to the sweetness of the fruit and the way the compote will be served. Spices such as cinnamon, clove, star anise or vanilla can also be used, but restraint allows the plum flavour to remain dominant.
Cool the compote promptly and refrigerate it, or freeze it in suitable portions.
Serve plum compote with:
Yoghurt.
Porridge.
Pancakes.
Rice pudding.
Cakes.
Ice cream.
Savoury dishes that benefit from a sharp fruit accompaniment.
This simple preparation is particularly useful for small batches that do not justify a full jam-making session.
Make Conventional Plum Jam
Conventional plum jam uses sugar to balance acidity, preserve the fruit and help create the expected consistency. Some recipes also use added pectin.
The correct proportion of fruit, sugar, acid and pectin depends on the recipe. Reducing the sugar in a traditional jam formula can prevent it from setting and may alter its keeping quality.
For a shelf-stable jam:
Use a current, scientifically tested plum-jam recipe.
Measure the ingredients accurately.
Do not increase the batch size.
Use the specified type of pectin, if required.
Follow the stated cooking and processing instructions.
Use the stated jar size and headspace.
Adjust the processing time for altitude where required.
Large batches often cook unevenly and may fail to set. Several correctly measured small batches are more reliable than one enormous pan.
An experimental or reduced-sugar plum spread should be refrigerated or frozen unless it follows a tested shelf-stable recipe.
What Is Hungarian Plum Jam?
Traditional Hungarian plum jam is called szilvalekvár.
Despite being translated as “jam”, it can be quite different from a conventional fruit jam. It is often made from very ripe plums without added sugar and cooked until much of the fruit’s water has evaporated.
The result is:
Very dark.
Dense and concentrated.
Naturally sweet.
Intensely flavoured.
Less glossy than an ordinary jam.
Thick enough to hold its shape when fully reduced.
Traditional production is particularly associated with plum-growing regions of Hungary, including the northeast. Families and communities historically cooked large quantities outdoors in cauldrons over a wood fire.
The prepared plums were stirred for many hours to prevent them from catching as the mixture reduced. Jam-making could become a shared seasonal activity, with people taking turns to manage the fire and stir the heavy preserve.
Some methods continued the reduction in residual bread-oven heat, allowing the plum mixture to become exceptionally thick.
Choosing Plums for Traditional Szilvalekvár
This method depends on the fruit’s natural sugar, so the plums must be fully ripe and flavourful.
Small, dark-blue European plum types are particularly suitable. Damson-type and traditional cooking plums often have a good balance of sweetness, acidity and dense flesh.
The best fruit is:
Fully ripe.
Naturally sweet.
Sound.
Richly flavoured.
Easily separated from the stone.
Not excessively watery.
Taste the fruit before committing it to a large batch. Slow cooking concentrates acidity as well as sweetness. Plums that taste unpleasantly sharp when fresh may produce a preserve that is too sour.
No-added-sugar plum preserve should not be confused with jam made from underripe fruit and artificial sweetener. Its sweetness comes from ripe fruit and concentration.
Traditional Hungarian Plum Preserve: Oven Method
A domestic oven provides a practical way to reproduce the slow concentration of traditional szilvalekvár without tending an outdoor cauldron.
This recipe contains no added sugar and is intended for refrigerator or freezer storage. Do not assume it is shelf-stable simply because it becomes very thick.
Ingredients
3 kg fully ripe plums
No sugar is required.
Optional spices can be added, but the traditional character of the preserve comes from the plums themselves.
Prepare the Fruit
Wash the plums, cut them open and remove every stone.
Inspect the fruit carefully and discard any spoiled sections.
Place the prepared plums in a large, deep, non-reactive ovenproof dish or roasting pan. The pan should be large enough to leave space above the fruit because the mixture can bubble and spit.
Do not use an unlined reactive metal pan with acidic fruit.
Begin the Cooking
Heat the oven to approximately 140°C.
Place the uncovered dish in the oven and allow the plums to soften and release their juice.
After the fruit has collapsed, stir it thoroughly, scraping across the base and into the corners of the dish.
Reduce the Plums Slowly
Continue cooking the plums uncovered.
Stir approximately once every hour during the early stages. As the preserve thickens, stir more frequently to prevent the concentrated fruit from catching around the edges or on the base.
The process will generally take several hours. The exact time depends on:
The water content of the plums.
The depth and width of the pan.
The quantity being cooked.
The oven.
The thickness required.
A broad pan encourages faster evaporation, while a deep narrow dish slows it.
Judge the Final Consistency
The preserve is ready when it is very dark, dense and visibly reduced.
Draw a spoon across the base of the pan. The mixture should separate briefly rather than flowing back immediately.
A spoonful placed on a cold plate should hold its shape with little or no watery liquid spreading around it.
For a traditional dense result, continue reducing until the preserve is considerably thicker than ordinary jam. Take care near the end because the natural sugars are concentrated and the mixture can scorch.
Choose the Texture
Leave the preserve rustic if the softened skins and fruit have broken down sufficiently.
For a smoother result, blend or pass the softened fruit through a food mill before the final stage of reduction.
Use great care when blending hot fruit.
Pack and Store
Spoon the finished preserve into clean, heat-safe containers.
Cool it promptly, cover and refrigerate. For longer storage, freeze it in small containers, leaving room for expansion.
This domestic recipe has not been presented as a tested canning formula. Refrigeration or freezing is therefore the appropriate storage method.
Yield varies considerably because the purpose is to remove water. Three kilograms of juicy plums may produce only a fraction of their original volume by the time the preserve is properly concentrated.
Stovetop Method
The same no-added-sugar preserve can be cooked in a broad, heavy-based pan on the stovetop.
Prepare and stone the plums, then begin cooking them gently until they release enough juice to prevent sticking.
Continue cooking uncovered over low heat, stirring regularly. As the mixture thickens, it will require almost constant attention.
Scrape the base and corners of the pan with each stir. If the preserve catches, do not scrape burnt material into the remaining batch. Transfer the unburnt portion carefully to a clean pan.
The stovetop method can provide close control, but it demands more active work than the oven method.
Cooking Szilvalekvár Outdoors
Traditional outdoor cooking is possible where local regulations, weather and fire conditions allow it, but it requires suitable equipment and continuous supervision.
Use:
A stable, purpose-built cooking arrangement.
A food-safe, non-reactive vessel.
Long-handled stirring equipment.
Heat-resistant gloves and clothing.
A controlled fire.
A safe supply of water or appropriate fire-extinguishing equipment.
Enough people to supervise both the fire and the preserve.
Never leave an open fire or a pan of thickening fruit unattended.
Hot plum preserve can cause severe burns. As it thickens, it may spit, and the mixture adheres to skin. Keep children and animals away from the cooking area.
The historical use of a copper cauldron should not be taken as a recommendation to cook acidic fruit in an unlined decorative copper vessel. Only use equipment that is specifically suitable for cooking acidic food.
Why No Sugar Is Added
In traditional szilvalekvár, sweetness and thickness are created through two related processes.
Very ripe plums already contain natural sugars. Long cooking removes water, concentrating those sugars and the fruit’s flavour.
This produces a preserve that can taste remarkably sweet even though nothing has been added.
However, removing water is not the same as following a modern tested canning process. Thickness alone does not confirm that a preserve is safe for room-temperature storage.
Flavouring Plum Preserves
Plums combine well with:
Cinnamon.
Clove.
Star anise.
Vanilla.
Ginger.
Orange zest.
Lemon zest.
Cardamom.
A small amount of suitable fruit spirit added for flavour.
Use spices sparingly. Long cooking intensifies them as well as the fruit.
Whole spices can be tied in a piece of food-safe muslin and removed at the end. Ground spices remain in the preserve and can become overpowering during a long reduction.
For traditional no-sugar plum preserve, an unflavoured batch is often the most versatile.
Use Thick Plum Preserve
Hungarian plum jam is used in both sweet and savoury cooking.
It can be:
Spread on bread.
Served with pancakes.
Used as a cake or pastry filling.
Added to dumplings.
Served with yoghurt or porridge.
Paired with cheese.
Used in sauces for suitable meat dishes.
Added to glazes.
Stirred into warm desserts.
Its dense consistency makes it particularly valuable as a baking filling because it is less likely to run than an ordinary soft jam.
Make Plum Chutney
Plums work well in chutney because they provide sweetness, acidity, colour and body.
They can be combined with onions, apples, dried fruit, vinegar and spices. A chutney intended for room-temperature storage must follow a tested recipe.
Do not reduce the vinegar, increase the amount of onion or alter the fruit-to-vegetable balance without reliable preservation guidance.
An experimental plum chutney can be refrigerated or frozen.
More information is included in Seasonal Chutneys, Relishes and Pickles.
Use Under-ripe Plums Carefully
Slightly under-ripe plums can bring useful acidity and pectin to conventional jams, but very unripe fruit may remain hard and sharply sour.
Do not confuse under-ripe fruit with immature windfalls that have failed to develop proper flavour.
Use sound, developed fruit and balance it with ripe plums in a tested recipe.
Windfalls damaged by impact, insects or contact with contaminated ground should be inspected particularly carefully and used promptly if suitable.
Keep Accurate Records
Plum trees can crop unevenly from year to year. Recording the harvest helps show how much fruit was gathered and which preservation methods proved useful.
Your Growing Companion can be used to record harvest quantities and compare varieties or individual trees.
For each batch of preserve, note:
The plum variety, if known.
The weight of prepared fruit.
Whether sugar was added.
The cooking method.
The approximate cooking time.
The final yield.
The storage method.
Whether the consistency and flavour were successful.
These details are particularly useful for long-cooked plum preserve because fruit moisture and sweetness vary each season.
Preserve the Fruit and the Tradition
Traditional Hungarian plum jam demonstrates how a simple ingredient can be transformed through patience rather than a long list of additions.
The old cauldron method was shaped by large harvests, shared work, wood fires and the need to keep food through winter. A modern oven can reproduce the same basic principle on a manageable scale: use fully ripe plums and slowly remove water until their flavour and natural sweetness become concentrated.
Freeze surplus fruit when time is short. Make compote for immediate use. Dry suitable plums and use tested recipes for shelf-stable conventional jam.
When making no-added-sugar szilvalekvár at home, refrigerating or freezing the finished preserve offers a straightforward way to respect the traditional method while following modern food-safety principles.
