Raspberry Jam

the most beloved of British preserves: fresh raspberries and sugar cooked briefly and hard to a soft, seed-flecked, deep-red set that keeps the fruit's fresh flavour — the jam of the sponge cake, the jam tart, and the buttered scone

Origin: England

From the journey of Raspberry.

Of all the fruits of the British garden, the raspberry may make the finest and the easiest jam. It is naturally high enough in pectin and acid to set without much help, and its flavour, unlike that of the strawberry, survives boiling remarkably well, so that raspberry jam tastes vividly of fresh raspberries in a way few cooked preserves manage. It became, from the eighteenth century onward, one of the staples of the British still-room and larder, and it holds a place in the national baking that no other jam quite matches: it is the jam that fills the Victoria sponge and the Swiss roll, that lines the bakewell and the jam tart, that is spread on the scone beneath the cream and stirred through the rice pudding and the sponge pudding. The classic English method is a quick, hard boil rather than the long simmer given to lower-pectin fruits: the raspberries are warmed to release their juice, the sugar is added and dissolved, and the whole is boiled hard for only a few minutes to reach setting point, so that the fruit is cooked as little as possible. The result is a soft, spreadable, brilliantly coloured jam, flecked with the tiny seeds that are, for most people, an essential part of its character.

Ingredients

  • 1 kg raspberries
  • 1 kg granulated or preserving sugar
  • 1 tbsp lemon juice
  • 1 knob unsalted butter (optional, to disperse scum)

Method

  1. Put two or three small saucers in the freezer to chill for testing the set. Sterilise your jars by washing them in hot soapy water and drying them in a low oven (120°C) for 15 minutes; keep them warm.
  2. Put the raspberries and lemon juice into a wide, heavy preserving pan and warm over a low heat for 4 to 5 minutes, crushing them lightly with a spoon, until the juice runs freely and the fruit is hot.
  3. Add the sugar and stir over a low heat until it has completely dissolved; do not let the jam boil before the sugar is dissolved, or it may crystallise. Once the sugar is fully dissolved, turn the heat to high and bring to a full, rolling boil.
  4. Boil hard for about 5 minutes, then begin testing for a set: take the pan off the heat, drop a little jam onto a chilled saucer, leave it 30 seconds, then push it with a fingertip. If the surface wrinkles, setting point is reached; if not, boil for another minute or two and test again.
  5. Leave the jam to stand for 10 minutes so the fruit settles evenly, then ladle into the warm sterilised jars, filling to just below the rim, and seal at once with lids. Label when cool.

Notes

Preserving sugar (with its larger crystals) gives the clearest jam and the least scum, but ordinary granulated sugar works perfectly well. Because raspberries are high in pectin, no added pectin is needed; if in doubt about a low-pectin batch, add the juice of a second lemon. For a seedless jam, press half the warmed fruit through a sieve before adding the sugar, leaving the rest whole for texture. This jam is the correct filling for a Victoria sponge, a bakewell tart, and a jam roly-poly.

The Gastrographer

The Gastrographer

Mapping Culinary History

To explore — select an ingredient below.

Journey Point Map Key

Ingredient originTrade or transit route
Became a culinary stapleColonial / trade control
© 2026 The Gastrographer. All original research, narratives, and illustrations. All rights reserved.