Ruby Red Rhubarb Jam Recipe (2024)

FAQs

How do you thicken rhubarb jam? ›

With a simple lemon juice trick, your homemade jam will achieve your desired thick texture. Preparing jam is about capturing the sweet essence of the fruit while simultaneously cooking it down to the perfect syrupy consistency.

Making jam without pectin is easy, you just have to cook it longer. This recipe produces a very thick, rich tasting jam, but if you like your jam a bit looser, cook it 5 minutes less than the suggested cooking time.

Although strawberries and rhubarb are naturally high in acid, they are low in pectin. However, they cook down to a lovely, thick consistency all on their own, without any added pectin using the easy tricks in this recipe.

If you simply take fruit and cook it with some sugar to sweeten it a little, it will get thick enough to turn into jam by the naturally occurring pectin in the fruit and the process of reduction. Reduction occurs when we simmer the fruit, and the liquid turns to steam and evaporates, which thickens the jam.

It's Not Only About Pectin

There's another reason why lemon juice is added to most jam recipes: for safe canning and to prevent the growth of bacteria. Bringing the pH level down means jars can be sealed in a regular boiling water bath in a reasonable amount of time (sometimes as little as 10 minutes).

Lemon juice contains both in abundance. The ratio we use when making jam is 1tbsp of lemon juice to every 1kg of fruit. woman&Home Food Writer, Keiron George, advises, “If you're having trouble with setting your jam, bring it to the boil again, adding the rind of a lemon for some extra pectin”.

Pectin Substitute

Cornstarch - Another plant-based thickening agent, cornstarch is a great substitute for pectin. Gelatin - For non-vegan menu items, you can substitute gelatin for pectin, but it will yield a different consistency.

Preservation using honey or sugar was one common method and the Ancient Greeks also used to use honey to preserve quince. Syrups made from honey and sugar were also used to preserve food; honey has no moisture so it preserves any food encased within it.

What happens if you add sugar before pectin in jam? ›

Do not vary the sequence in which the ingredients are added. For example, powdered pectin does not dissolve in a sugared solution, so if you add the sugar and then the dry pectin, the jam will not be firm. Be sure you use a kettle large enough to accommodate the preserves when they are brought to a full rolling boil.

You will need approximately half the amount of pectin that is indicated by your recipe. Please be careful when adding pectin as too much will leave you with a set that is too solid and it is not possible to rectify this so always add less than you think is necessary and test the set and then add more if required.

Sadly, sugar plays a huge role in set. If you cut the amount in the recipe and you don't compensate with a pectin designed for low sugar preserving, your jam may well be runny. Did you check for set while the jam was cooking? Any time a recipe gives you a cooking time, it's simply an approximation.

If you're struggling to set your jam, it's most likely down to the cooking: “If you're getting a thick, syrupy mass, then you're cooking it for too long and missing the setting point,” Corbin says.

High in oxalic acid

Rhubarb contains approximately 570–1,900 mg of oxalate per 3.5 ounces (100 grams). The leaves contain the most oxalate, comprising 0.5–1.0% of the leaf ( 3 ). Too much oxalate in the body can lead to a condition known as hyperoxaluria, which is when excess oxalate is excreted in the urine.

Rhubarb pie filling can become runny if the stewed rhubarb has been stewed with too much liquid. If your stewed rhubarb is very wet it can be thickened by adding cornflour (corn starch) or arrowroot.

You can make your own fruit filling by using homemade or store-bought jam and thickening it up a bit by simmering it with some cornstarch mixed with water (about a tablespoon of cornstarch mixed with a teaspoon or so of cold water to make a paste, then stir into ½ to ¾ cup of jam).

Pectin is often used as a thickener in cooking and baking. It is a natural polysaccharide (starch) product extracted from fruits and is commonly used as a natural thickening and setting/gelling agent that shouldn't affect the taste or smell of your recipes.