Making Wild Garlic Pesto from Spring Woodlands

Spring's Most Generous Free Harvest

By mid-April the woods are loud with it. Walk into any damp, shaded woodland on heavy soil and you will smell wild garlic before you see it — that green, onion-sharp scent hanging above the bluebells. In Britain we also call it ramsons, and from March through to early June it carpets the ground in broad, glossy leaves. For a forager it is the easiest win of the year: abundant, straightforward to identify, and delicious in quantities that would cost a small fortune at a farmers' market.

There is something very satisfying about a crop that arrives free and all at once. The difficulty is what to do when you come home with a carrier bag of leaves and a week to use them. Pesto is the answer. It takes twenty minutes, it holds the flavour better than almost any other method, and it sits happily in the fridge for a fortnight.

Finding and Picking It Well

Identification matters, so let's be careful. Wild garlic leaves are broad, oval and pointed, rising in loose clumps from the base of the plant, and the scent of garlic is unmistakable when you rub a leaf between finger and thumb. If it does not smell of onion, do not pick it. It can be confused with lily of the valley, which is toxic but usually grows in pairs with no scent, and with lords and ladies — also called cuckoo pint — which has arrow-shaped leaves with dark speckles. Smell everything, every time. Once that scent is fixed in your head, you will never muddle them again.

Pick in dry weather, after the dew has lifted, and take leaves from the middle of a large patch rather than the fringes, so the colony keeps its structure and its flowers. Never pull the bulbs. Under the Wildlife and Countryside Act 1981 it is an offence to uproot any wild plant without the landowner's permission, and digging up bulbs destroys the patch for everyone. Picking a few leaves for your own pot is generally accepted, but check first whether you are on a nature reserve, a Site of Special Scientific Interest or private land, and ask where permission is needed. Take only what you will genuinely use; no patch should look as though you have been there.

The same restraint applies on heathland, which is a different larder altogether. Heathland gives you bilberries, wood sorrel and the first young heather shoots, but it is slow-growing and easily damaged underfoot, so keep to paths, take very little, and never dig. Woodland is the place for wild garlic; leave the open heath to recover in peace.

The Pesto: What You Need

This makes roughly 300ml — a good jar plus a little extra for the week ahead.

• 100g wild garlic leaves, washed and patted dry
• 50g hazelnuts, blanched and lightly toasted
• 50g mature hard cheese, finely grated — a well-aged Cheddar or a hard sheep's cheese works beautifully
• 150–200ml cold-pressed rapeseed oil
• Zest and juice of half a lemon
• Flaky sea salt and black pepper

Note what is missing: no garlic clove, no basil, no pine nuts. Wild garlic brings its own allium punch, and British rapeseed oil gives a clean, slightly grassy finish that suits it far better than a heavy olive oil.

The Method, Step by Step

• Toast the hazelnuts in a dry pan over a medium heat until they smell nutty and the skins begin to lift. Tip onto a plate and let them cool completely — warm nuts go oily in the blender.
• Pulse the cooled nuts and the grated cheese together until you have coarse crumbs.
• Add the wild garlic leaves and pulse briefly. Keep it chunky. If you blitz it to a purée the texture turns dull and the colour dulls with it.
• With the motor running slowly, pour in the oil in a thin stream until the mixture loosens into a spoonable paste. You may not need all of it.
• Stir through the lemon zest and juice, then season with salt and pepper. Taste and adjust — wild garlic varies hugely in strength depending on how far into the season it is.
• Spoon into clean jars, press down to remove air pockets, and pour a thin film of oil over the surface to seal it.

Variations Worth Trying

• Swap hazelnuts for walnuts, or use sunflower seeds if you are cooking for someone with a nut allergy.
• Add a handful of flat-leaf parsley or a few sprigs of lemon thyme for a softer, more herbal edge.
• A pinch of dried chilli flakes lifts the whole thing and stops it tasting flat on toast.
• For a looser dressing, whisk a spoonful of the pesto with extra oil, a squeeze more lemon and a splash of water — perfect over new potatoes while they are still warm.

Keeping, Freezing and Eating

Keep the jars in the fridge and use within two weeks. Homemade pesto preserved under oil is not a shelf-stable product, so treat it as a fresh food and do not leave it out on the counter. For longer storage, spoon the pesto into an ice cube tray, freeze, then tip the cubes into a bag. They keep for six months and drop straight into a hot pan.

As for eating: toss through hot pasta with a spoonful of the cooking water to loosen it, spread on sourdough under a poached egg, stir into mashed potato, or swirl into a bowl of spring soup just before serving. Wild garlic fades quickly when cooked, so add it at the very end. And when the season passes, remember where the patch was — it will be there again next April, waiting.