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

FAQs

How to 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.

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.

If, after waiting, you find the jam is still too loose for your liking, empty the jars back into a wide pot and cook again. Wash and sterilize the jars and try again. 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.

Lemon is crucial to balancing those sweet flavors, but it also helps the pectin to firm up the jam. It can be added at the start of the cooking process or towards the end, but what must be taken into account is that adding liquids to the jam mixture will inevitably require the jam to cook for longer.

Cornstarch is a common thickening agent for jams, sauces, soups, and glazes. It's also a viable option for jam recipes with less added sugar or ones that feature fruits with naturally less sugar or pectin.

Chia seeds act as a thickening agent

And if you're looking to make your homemade jam more nutritious, chia seeds can help with that, too. According to Gimme Some Oven, you can make a delicious jam at home using only fruit, chia seeds, and a little lemon juice –- no added sugar needed.

If you really want to thicken it to a more spreadable consistency, the easiest way is to heat it up with some thickeners such as cornstarch. Arrowroot flour is more delicate and taste-neutral, but most cooks won't have it. Unflavored gelatin may also be used.

The Magic of Macerating

One of my favorite tricks for jam-making is macerating the fruit first. Macerating is the process of coating the fruit in sugar and letting it rest for a few hours or overnight, which pulls some of the juice out of the fruit and creates a syrup with the sugar.

Should I stir jam while it's boiling? ›

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.

The earliest fruit preserves would be made by mixing fruit pulp with honey and allowing it to dry in the sun, creating a texture more like that of a jellied sweet. The high-pectin quince lent itself to making this well-set fruit preserve.

Before the availability of commercial pectin products, traditional jams and jellies were made by cooking fruit or fruit juice with sugar until the mixture reached a jelly-like consistency.

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.

Optional: in a little cup mix 1 tablespoon of cornstarch and 2 tablespoons of water, then pour into bubbling fruit stuff stirring constantly for another two minutes.

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.

Continue to simmer for about 20 to 30 minutes more, stirring often so it does not stick to the bottom of the pan. As it cools, the jam will continue to thicken and deepen in color.