How to Make Bramble Jelly: A UK Blackberry Recipe

What is bramble jelly, and how is it different from jam?

Bramble jelly is the clear, jewel-bright cousin of blackberry jam. You cook the berries down with a little water, then strain the whole lot through a jelly bag so that only the juice drips out. That juice is boiled with sugar until it sets, and what you end up with is a smooth, glossy preserve you can almost see through, with no seeds and no pulp.

Jam works the other way. When you make blackberry jam you cook the fruit with sugar and keep everything in the pot, skins and pips and all, so the finished preserve is thick, dark and full of texture. It is lovely stuff, and if you want to make it our guide to making jam walks you through it. The trade-off is those pips, which get everywhere and lodge in your teeth. Jelly trades away the fruit pulp in exchange for a clean, glowing set.

So the difference is really one decision: do you keep the fruit, or do you keep only its juice? Keep the fruit and you have jam. Strain it and you have jelly.

Why make jelly rather than jam with brambles?

Blackberries are packed with hard little pips, and plenty of people simply do not enjoy them. Turn a good haul into jam and every spoonful is a mouthful of seeds. Straining the cooked fruit through a jelly bag removes all of that, which is why bramble jelly has been the traditional British way to preserve blackberries for generations.

There is a practical reason too. Come late August and September, the hedgerows are heaving, and if you have been out foraging blackberries you often come home with far more than you can eat fresh. Jelly is the classic answer to a foraged glut. It stores for months, it looks beautiful on the shelf, and it turns a free afternoon in the lanes into a row of jars that will see you through winter.

Jelly trades away the fruit pulp in exchange for a clean, glowing set, and it is the classic British answer to a hedgerow glut.

The one thing to accept up front is that jelly is less generous than jam. Because you throw away the pulp and keep only the juice, you get fewer jars from the same weight of fruit. For most people the clear, pip-free result is well worth it.

Do blackberries have enough pectin to set?

This is where bramble jelly catches people out, so it is worth understanding before you start. Pectin is the natural setting agent in fruit. Heated with sugar it forms a web-like structure that traps the liquid and turns your bubbling juice into a firm jelly, and acid helps those pectin molecules bond and hold together.

Blackberries are only moderate in pectin. They are not one of the high-pectin fruits like cooking apples, currants or lemons, and, frustratingly, their pectin drops as they ripen. A hedgerow glut in September is usually made up of big, soft, jet-black berries at the very end of the season, which is exactly when pectin is at its lowest. Cook those on their own and you can easily end up with a delicious but disappointingly runny syrup that never sets.

There are four traditional ways to fix this, and you can combine them:

• Add lemon juice. The acid lowers the pH and helps the pectin set. The juice of a lemon to every 450g or so of berries is a common ratio, and it sharpens the flavour nicely too.
• Use some slightly under-ripe berries. Pectin is highest in fruit that is only just ripe, so throwing in a proportion of firmer, redder berries alongside the ripe ones gives you a natural pectin boost.
• Add a cooking apple. This is the classic move, and it gives you bramble and apple jelly. A chopped cooking apple (skin, core and all, since that is where much of the pectin lives) simmered in with the blackberries brings plenty of setting power and a gentle background flavour.
• Use jam sugar. Sugar with added pectin takes the guesswork out entirely. It is the reliable choice if you are working with very ripe fruit and would rather not gamble on a set.

If you like a hedgerow flavour and a guaranteed result, bramble and apple jelly is the one to reach for. If you want pure, intense blackberry, lean on the lemon juice and a few firmer berries.

How do you make bramble jelly, step by step?

You will need a large heavy-based pan, a jelly bag (or a square of scalded muslin) and a stand or an upturned stool to hang it from, a big bowl to catch the juice, and clean jars with lids. Scald the jelly bag in boiling water first so it is clean and ready.

1. 1

   Prepare the fruit

   Pick over roughly 1.5kg of blackberries, discarding any mouldy or unripe-green ones, and give them a rinse. If you are making bramble and apple jelly, roughly chop a cooking apple or two, skin, core and pips included, and add them in.

2. 2

   Simmer until soft

   Put the fruit in the pan with about 300ml water and the juice of a lemon. Bring to a gentle simmer and cook for 20-25 minutes, crushing the berries against the side of the pan now and then, until the fruit is completely soft and the juice runs freely.

3. 3

   Strain through the jelly bag

   Set the scalded jelly bag over a bowl and pour in the cooked fruit and juice. Leave it to drip for several hours or overnight. Do not squeeze or press the bag, however tempting it is, or the jelly will turn cloudy.

4. 4

   Measure the juice and add sugar

   Measure the strained juice into the cleaned pan. Add sugar in proportion: around 450g sugar for every 600ml (1 pint) of juice. Warm gently, stirring, until every grain of sugar has dissolved before it comes to the boil.

5. 5

   Boil to setting point

   Turn the heat up and boil hard, without stirring, until the jelly reaches setting point, roughly 104-105 degrees C on a sugar thermometer, or until it passes the wrinkle test. This usually takes about 8-10 minutes.

6. 6

   Skim, pot and seal

   Take the pan off the heat and skim off any foam with a slotted spoon. Pour the hot jelly into hot, freshly sterilised jars, filling them near the top, and seal straight away while everything is hot.

How do you know when it has reached setting point?

Setting point is the moment the boiling juice has driven off enough water for the pectin, sugar and acid to gel. It sits at around 104–105°C, so a sugar thermometer clipped to the side of the pan is the easiest way to judge it.

If you do not have a thermometer, use the wrinkle test, which generations of British cooks have relied on. Pop two or three small saucers in the freezer before you start. When you think the jelly is close, take the pan off the heat, spoon a little jelly onto a cold saucer and leave it for a moment to cool. Push it gently with your fingertip: if the surface wrinkles and holds, it has reached setting point. If it stays thin and runny, return the pan to a hard boil for another few minutes and test again on a fresh cold saucer.

A quick word on jars, because this is the part you must not cut corners on. Wash your jars in hot soapy water, rinse them, and dry them in an oven at around 130–140°C for ten to fifteen minutes so they come out clean and hot. Filling hot jelly into hot jars gives you a good seal and a preserve that keeps. Pouring hot jelly into cold jars risks cracking the glass, and potting into jars that are not properly sterilised is how a batch grows mould. Have the jars ready and hot before your jelly hits setting point.

How much does it make, and how do you store it?

Yields vary because you are keeping only the juice, but as a rough guide around 1.5kg of blackberries strained and boiled with sugar gives you three or four standard 340g jars. Adding a cooking apple lifts the yield a little as well as the set. It is always worth having an extra sterilised jar standing by, since it is annoying to reach setting point and find yourself one jar short.

Stored in a cool, dark cupboard, properly potted bramble jelly keeps for up to a year. A lighter or lower-sugar version, or a quick jelly, may keep for only a month or so, so it pays to label every jar with the date you made it. Once a jar is open, keep it in the fridge and use it within a few weeks. If you ever open a jar and see mould, smell fermentation or find the lid has bulged, throw the whole jar away rather than scraping the top off; a poor seal or an under-sterilised jar is not worth the risk.

How do you serve bramble jelly?

The obvious home for bramble jelly is breakfast: spread thickly on hot buttered toast, or on a warm scone with a little clotted or salted butter. It also does something jam cannot, because that clear, wobbling set looks lovely spooned into a tart case or brushed over a fruit pudding as a glaze.

Do not stop at the sweet uses, though. A dark, sharp bramble jelly is a natural partner for meat and game. Serve it the way you would redcurrant jelly, alongside roast lamb, venison, duck or a slice of cold Christmas ham, or stir a spoonful into the pan juices to make a quick, glossy gravy. It is at home on a cheeseboard too, where it cuts through a mature cheddar or a creamy goat's cheese beautifully. For more ideas on putting a hedgerow harvest to work, browse the rest of our preserving guides.

Related guides

If bramble jelly has given you the preserving bug, these will keep you going:

• Prefer to keep the fruit and the texture? Our guide to making jam covers the same setting-point and sterilising rules for a thicker, chunkier preserve.
• Need to gather the fruit first? Foraging blackberries in the UK covers where and when to pick, and how to tell a good berry from a past-it one.
• Want the bigger picture? The preserving hub rounds up jams, jellies, chutneys and everything else worth putting in a jar this autumn.