Elderflower Cordial: Foraging, Infusing and Bottling

Why Elderflower Deserves a Place in Your Kitchen

Elder is the forager's first great prize of the year. It grows almost everywhere in Britain — hedgerows, railway embankments, allotment edges, the neglected corner of a car park — and from late May it fills the lanes with heavy, honeyed scent. The flowers arrive in that quiet gap between the last of the spring greens and the first soft fruit, which is exactly why a bottle of elderflower cordial feels like such a treat in July.

The window is short. A good bush gives you perhaps a fortnight of usable flowers, and a hot, dry spell can cut that to a week. Take a modest share from each bush rather than stripping one bare: the berries that follow in September are food for blackbirds and dormice, and they make excellent jelly if you can bear to wait.

When and How to Pick Elderflowers

In southern England the season often opens in the last week of May and runs to mid-June. Move north or uphill and it shifts later — Scottish bushes may not be ready until the end of June, and a cold spring can delay everything by a fortnight. Go by the plant, not the calendar: you want flat-topped heads of tiny creamy-white flowers, fully open and smelling strongly sweet, with no brown edges and no sign of the petals beginning to fall.

• Pick dry. A sunny morning after the dew has lifted is ideal. Wet flowers dilute the flavour and sour quickly.
• Choose clean sites. Avoid bushes within a few metres of a busy road, and anything at dog height beside a popular footpath.
• Shake as you go. Give each head a gentle tap to dislodge beetles, bees and ladybirds before it goes in the bag.
• Use a basket or paper bag. Plastic sweats and turns the flowers brown within hours.
• Snip, don't snap. Cut the stem just below the head with scissors and leave the woody branch intact.

Use your haul the same day if you possibly can. Left overnight in a warm kitchen, the scent fades noticeably.

Identifying Elder Safely

Elder has opposite, pinnate leaves with serrated leaflets and a distinctly sour, almost catty smell when crushed. Its flowers sit in wide, flattish clusters up to 20cm across on woody stems. Two things cause confusion. Dwarf elder grows low to the ground and smells unpleasant — leave it alone. More seriously, several umbellifers such as cow parsley and hemlock carry flat white flower heads; they have feathery, fern-like leaves and hollow green stems, not woody branches.

Never eat the leaves, stems, bark or raw berries — they contain compounds that cause stomach upset. If you are not completely certain of your identification, walk away and buy the cordial instead. There is no shame in it.

The Classic Cordial

This makes roughly 1.5 litres of concentrate, enough for about thirty drinks.

• 20–25 good-sized elderflower heads, insects shaken out
• 1.5kg granulated sugar
• 1.5 litres water
• 2 unwaxed lemons, zest pared in strips and fruit sliced
• 50g citric acid

Warm the water and sugar in a large pan, stirring until the sugar dissolves completely — you do not need a rolling boil. Take it off the heat and stir in the citric acid, then pour the hot syrup over the flowers and lemon in a big bowl or clean bucket. Cover with a cloth and leave somewhere cool for 24 hours. If you want a deeper, more perfumed cordial, stretch it to 36 hours, but no longer: after two days it starts to taste grassy and stewed.

Strain through muslin or a clean tea towel, pressing the lemon slices gently to release their juice, then funnel into bottles. The citric acid does two jobs — it sharpens the flavour and helps the cordial keep.

Bottling, Storing and Freezing

Sterilise your bottles properly by washing them in hot soapy water, rinsing, and drying them in a low oven for ten minutes. Fill while the bottles are still warm, seal, and label with the date. With citric acid, cordial keeps for three or four months in a cool, dark cupboard; once opened, refrigerate it. Made without citric acid, it needs the fridge from the start and is best used within a fortnight.

Freezing is the easiest long-term option. Use plastic bottles, never glass, and leave about 4cm of headspace for expansion. You can also freeze the flower heads themselves: spread them on a tray, freeze until solid, then bag them. They will not be quite as fragrant, but they make a serviceable cordial in November.

Beyond the Glass

Dilute one part cordial to five parts water — still or sparkling — over plenty of ice, with a sprig of mint and a slice of lemon. It is also excellent with gin, splashed into a white wine spritzer, or drizzled over poached gooseberries and whipped cream.

Once you have a few bottles in the cupboard, try elderflower gin by steeping a dozen heads in a jar of gin for two or three days before straining, or elderflower vinegar, made the same way with white wine vinegar over a fortnight. Both capture that fleeting June scent long after the hedgerows have gone over to berries.