THE CRUMB INSTITUTE
HYDRATION 70.0 % DOUGH TEMPERATURE 24.1 °C BENCH REST 41 min
[NOTICE: THE BENCH WAS CHECKED FOR LEVEL AT 08:00 AND WAS LEVEL] — FLOUR STORE HELD AT 14.2 °C AND 51 % RELATIVE HUMIDITY — VESSEL PLACED AND TARED TO ZERO — 350.0 g OF WATER ADMITTED AT 21.4 °C IN A SINGLE CONTINUOUS POUR — SALT WEIGHED SEPARATELY AS SPECIFIED, 9.0 g — THE STIRRING WAS JUDGED TOO FAST AND WAS SLOWED — THE OVEN TIMER IS SET TO 38 MINUTES AND NOT TO 79 MINUTES — [NOTICE: THE BENCH WAS CHECKED FOR LEVEL AT 08:00 AND WAS LEVEL] — FLOUR STORE HELD AT 14.2 °C AND 51 % RELATIVE HUMIDITY — VESSEL PLACED AND TARED TO ZERO — 350.0 g OF WATER ADMITTED AT 21.4 °C IN A SINGLE CONTINUOUS POUR — SALT WEIGHED SEPARATELY AS SPECIFIED, 9.0 g — THE STIRRING WAS JUDGED TOO FAST AND WAS SLOWED — THE OVEN TIMER IS SET TO 38 MINUTES AND NOT TO 79 MINUTES —
2026-09-30 · incident

Incident report: Oven 3

At 09:14 on 14 August a single 800 g loaf was loaded into Oven 3 at 78.4 % hydration. The timer was set. The timer was set incorrectly, to 79 minutes rather than 38, and the error was not detected because the keeper who set it had been asked to set it and had set it and had then gone to the bench.

The loaf was removed at 10:33. It is the position of this report that the loaf was, by that point, no longer a loaf. The crust had carbonised through approximately 11 mm on all faces. The interior was measured at 96 °C, which is above the temperature at which the crumb structure can be said to be present.

Root cause

The oven timer defaults to 79 minutes. It has defaulted to 79 minutes since the oven was installed in 2019. No keeper has ever set it correctly on the first attempt, and this is the fourth incident of this type. The previous three were not reported because the loaves were smaller.

Actions taken

A label has been applied to the timer reading "38". The label is visible. The oven has not been replaced, because the oven is not at fault and the Institute cannot afford an oven.

Open questions

Whether the burnt loaf should be retained as a specimen. It has been retained as a specimen. It is on the second shelf, where it has been for six weeks, and it is now the oldest object in Oven Hall that was made here.

Loaded
09:14
14 August. Single 800 g loaf at 78.4 % hydration.
Timer set to
79 min
The oven default. The intended value was 38 minutes.
Removed
10:33
Crust carbonised to 11 mm. Interior at 96 °C.
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