Easy Plum Jam Recipe (2024)

FAQs

Can plums be too ripe for jam? ›

Fruit that is slightly under-ripe contains more pectin than ripe fruit. I recommend using about 1 cup of slightly under-ripe plums. Don't use overly ripe fruit. It will make your jam too runny.

Continue stirring the plums and sugar until the fruit starts to turn translucent. At this time, taste for sweetness. Take a small amount of the (still liquid) jam in a teaspoon, cool and taste it. If it tastes too sour for your liking, add a teaspoon or two more of sugar and continue cooking.

Cut the plums in half, roughly, but don't bother pitting or peeling them. Cook according to your favorite jam recipe (the fruit will cook off the pits). When the jam has jelled, pour it into a large-holed enamel colander over a large pot.

Fruit preserves refer to fruit or vegetables that have been prepared, canned or jarred for long term storage. Jam refers to a product made with whole fruit, cut into pieces or crushed. Preserves contain chunks of fruits but jams do not; jams contain fruit pulp.

Freezing plums is as easy as can be, and the fruit wedges will last up to six months in your freezer. Use your frozen plums to make jam or preserves, add them into smoothies, or eat the wedges straight out of the freezer for a cool treat.

If, on the other hand, the jam is rock solid, that means you've gone too far and cooked it too long. You can try adding a little water to thin it out, but bear in mind that after overcooking a jam, you can't really get those fresh fruit flavors back.

Lemon juice contains natural pectin, a substance found in the cell walls of fruits that helps to thicken and set the jam or jelly. Pectin is crucial for achieving the desired consistency and texture in jams and jellies.

Adding acid in the form of fresh lemon or lime juice is important for two reasons: First, it makes for a more well-balanced jam, returning some of the acidity lost with the addition of sugar. Second, pectin needs acid to properly activate, or firm up.

While you can simply reduce the jam to your liking, you can also add commercial pectin or chia seeds to the reducing jam to guarantee thickening.

Homemade fruit preserves can last for up to year or even longer if it is unopened and stored in a cool, dry place, such as a pantry or kitchen cupboard. However the flavour and texture of your jam will start to deteriorate after around 6 months, even if you keep them tightly sealed.

Why is my plum jam runny? ›

Too little sugar: Much like pectin, some fruits are higher in natural sugar than others. Jams made from fruits with higher sugar content thicken on their own more easily than those with less sugar. A no-sugar or low-sugar recipe might not call for enough sugar to naturally thicken the jam, even at a rolling boil.

So if you use pieces of fruit or whole berries, you are actually using less fruit than if it were mashed, or cooked to a mash and then measured, and you will get a firmer jell. Or you may have used more pectin than the recipe called for. For example, if you used Tablespoons of pectin rather than teaspoons.

The two main types of commercially grown plums are European (prunus domestica) and Japanese (prunus salicina). European plums, aka prune plums, are mainly grown to be turned into dried plums. Their thick skins, high sugar content, and dense flesh make them ideal for drying, and best for baking and jam-making.

Jam and jelly have virtually the same nutritional value, fruity taste, and spreadable texture. Thus, you can use them interchangeably. That said, some studies have analyzed the nutritional profile of jams after 9 months in storage and observed no significant losses in their antioxidant content.

Q: How long can I keep my homemade jams and jellies once I open them? A: Opened home-canned jams and jellies should be kept in the refrigerator at 40°F or lower. “Regular” – or pectin-added, full-sugar – cooked jams and jellies are best stored for 1 month in the refrigerator after opening.

Avoid making jam with overripe fruit, because as fruit ripens the pectin begins to break down. My rule of thumb for the ratio of fruit / sugar / lemon juice: Weigh your fruit.

Just like nectarines and pears, plums complete their ripening cycle off the tree. This is why you will typically purchase them firm and allow them to sit at room temperature a few days to soften. Depending on the firmness at purchase, this can take up to four days.

Ripe plums may drop easily from the branches so it's a good idea to use a drop sheet or tarp to catch excess fruit. Storage tips: Plums will continue to ripen off the tree. Place ripe fruit in the fridge right away, and let unripe fruit ripen on the counter or in a paper bag.