How to Make Blueberry Jam (no pectin recipe) (2024)

FAQs

How do you make blueberry jam thicker? ›

How do you thicken blueberry jam? The easiest way to thicken your jam is to allow the sugar and blueberry mixture to cook down by boiling. Then thicken and set into a gel by using pectin.

The secret ingredient to making jam without pectin is time. The fruit and sugar need plenty of time to cook and thicken. A long, slow boil drives the moisture out of the fruit, helping to preserve and thicken it at the same time. Fruit varies in water content as well, and some fruits may take longer to jam up.

Blueberries are naturally high in pectin, a starch that is used to thicken jams and jellies. These preserves don't need to be as thick as jam, so we won't be using it for this recipe. If I want a thicker consistency, I use cornstarch since I always have it in my pantry.

The natural pectin in fruits and vegetables thickens jams. If there isn't enough pectin in the fruit itself and you don't add extra pectin, the result is runny jelly or jam. Additionally, if the fruit is overripe, its pectin levels are lower.

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.

To remake cooked jam or jelly without added pectin, for each 1 L (4 cups) jam or jelly add 25 mL (2 tbsp) bottled lemon juice. Heat to boiling and boil jam or jelly hard 3 to 4 minutes, then test for signs of gelling.

Throwing in an extra tablespoon of lemon or lime juice at the end can help, but avoid adding any more than that as it could make the jam runny.

Use fresh, dry, slightly under-ripe fruit. Strawberries and raspberries are best layered with the sugar and left for a couple of hours before cooking. Plums, currants, gooseberries, cherries etc need to be lightly poached before sugar is added. Pectin, naturally found in fruit is vital to make your jam set.

5. Do Not Stir Once Mixture Is Boiling. Once your jam/marmalade it has reached a rapid rolling boil do not stir it. Stirring it will alter the temperature of the jam/marmalade meaning it will take longer to reach the setting point.

What is the difference between blueberry jam and blueberry preserves? ›

Jelly: Jelly is made with strained fruit juice. There are no pieces of fruit in jelly. Jam: Jam is made with mashed fruit. Preserves: Preserves have whole fruit or large pieces of fruit.

“Frozen fruit can be used very successfully,” says Pam Corbin, author of Pam the Jam: The Book of Preserves, who recommends buying from britishfrozenfruits.co.uk. “However, if the fruit is wet, or over-ripe, and then frozen, this may result in runny jam.”

While pectin naturally occurs in fruit, the amount can vary. Fruits such as citrus, tart cooking apples, cranberries, and quince are high in pectin. Fruits such as late-season blackberries, cherries, and nectarines, are at the low end of the pectin scale.

Use fruit at the peak of their ripeness. Unripe fruit can be quite watery and will thin down your jam. If you wash your fruit, make sure you drain them well. Again, it is down to extra water content.

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.

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.

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).