Egg and Cress

The cress in a chiller-cabinet egg and cress sandwich is stirred into the egg, and that one decision explains most of the build. Shoots laid flat against buttered bread sweat within hours and slump into a green film, so the factory chops them through the filling, where they stay as fine flecks that keep their peppery edge. Tear open the plastic wedge and the first thing is cold: cold film, cold bread, a faint sulphur smell off the egg with a clean mustardy note over it. The cress shows up as threads of green in the pale filling, and each bite carries a small snap of pepper that cuts the mayonnaise, so a mild, soft sandwich arrives with something sharp already inside it.

The bind decides whether the sandwich survives the day. Egg is chopped fine and held with mayonnaise at a slightly firmer set than anyone would make at home, because mayonnaise loosens and creeps into the crumb over a long shelf life, and a filling that looked right at assembly turns to slick by lunch. Butter goes to the very edges of the soft white slices to seal the crumb against that creep. The bread is chosen to stay supple when cold, so it gives without a fight and nearly dissolves against the tongue, while the filling stays cool and smooth against the lip, with a little white pepper glowing at the back of the throat.

The triangle is a packaging decision as much as a culinary one. Cut on the diagonal, the sandwich shows its filling through the window of the carton, and the wedge slides into a rack of identical wedges. The film crinkles and the pack splits along its seam, the sounds of a desk lunch at one o'clock in an open-plan office, where egg has a reputation for travelling down the row. Eaten on a train platform or at a keyboard, it is food made for one hand and a short break, and the point of the triangle is the last bite, soft and cold and the most peppery where the cress has settled.

Age shows in particular places. Past its date the cress goes limp and grey-green and its pepper fades to a vegetal dullness. Egg boiled too long carries a greenish-grey ring around the yolk and a harder sulphur smell, and the bread picks up a damp, tacky skin where the mayonnaise has migrated. A sandwich bought late in the day sits closest to these failures, which is why the whole build leans on moisture control: firm bind, sealed crumb, shoots folded in. Where the tea-tray version lays its cress in a green stripe, the carton version has to hide it in the mixture to last.

The shelf around it is mostly neighbours made from the same pieces. Egg mayonnaise drops the cress and relies on pepper alone. Salad cream gives an older, tangier bind. Watercress brings a leafier heat than the fine seedling. At bakeries and station kiosks the same filling goes into a soft roll or onto malted brown bread, and the finger sandwiches of an afternoon tea tray carry the same pairing cut thin and crustless. Whatever the bread, the pairing stays constant: soft cold egg with a small sharp green thing running through it.

Origin and history

The first person to put cress with egg between bread is unrecorded, and the pairing grew out of ordinary British tea-table and lunch-box habit. What can be dated is its industrial life. Marks & Spencer is generally credited with the first chilled prepacked sandwiches sold by a British supermarket, in 1980, at 43p in a small number of stores. Accounts of the launch range differ, and egg and cress turns up in some lists of the early fillings.

Railways had been selling sandwiches over the counter long before that. British Rail ran a sandwich service from 1948 into the 1990s (sources give 1994 or 1997 as the end), and the triangles sat under glass domes on station counters until their corners curled. Catering kitchens treated the filling as something to be measured, and the sandwich was cut on the diagonal so that the contents would show at the cut face, the same logic the supermarket carton later borrowed.

The firmest record is a November 1971 recipe document issued by the Director of Rail Catering, Bill Currie, which specified that each egg and cress sandwich should contain one-twelfth of a punnet of cress. The National Railway Museum in York found the document in 2001, and it was shown in the 2002 exhibition British Rail: A Moving Story. Twelve sandwiches to a punnet is a workable ration for a kitchen making them by the tray, and it puts a counted portion of cress into the egg and cress sandwich in 1971, nine years before the first supermarket chiller pack of 1980.