No. 3411

Leaven

Levain

Sift a barrel of flour into one end of the kneading trough; into the other end strain thirty-one quarts of ferment through a colander, and work enough of the flour into it to form a dough, not too consistent; gather up this dough into a small space in the trough and keep it in position with a movable board which answers for a partition; dredge it over with flour, and cover with the lid of the trough, then leave it to rise for three hours; at the end of that time the sponge should be double its size and ready to fall again; it is then ready for the dough.

← No. 3410 Ferment Bakery & Breads No. 3412 The Dough →

For the Modern Kitchen

This is not a finished bread but the middle stage of a three-part professional bakery sequence: the ferment (No. 3410) builds the yeast, this leaven multiplies it, and the dough (No. 3412) follows. The quantities are for a bakehouse working a barrel of flour at a time, so the useful thing here is the ratio and the visual cue, not the numbers.

The hinge: catch it before it fallsThe sponge is ready when it has doubled and is about to collapse — domed, slack, and beginning to sink at the centre when jarred. Taken past that point it goes sour and slack and will not carry the final dough; taken well before, the bread is dense and underflavoured.
A barrel of flourThe American standard barrel of flour was 196 lb. Thirty-one quarts of ferment is roughly 29 litres, so across the whole barrel that is about 150 ml of ferment per pound of flour. Note that this is the figure for the finished dough, not for this stage: only part of the flour goes into the leaven, so for a home sponge add ferment to flour until it forms a soft dough rather than working to a fixed ratio.
"Not too consistent"He means a soft, slack dough rather than a firm one — but still a dough that can be gathered up and hold its shape, since it is penned with a board and dusted with flour. Only part of the barrel of flour is worked in at this stage; the rest waits in the trough for the final dough.
The kneading troughA large wooden box with a lid, used both as mixing bowl and proofing chamber. The movable board penned the sponge into one end so it kept its height instead of spreading. A covered bowl or a lidded plastic tub does the same job.
Three hours means three hours in a warm bakehouseThe book gives no temperature; three hours implies a warm working bakehouse rather than a cool kitchen. In a cool modern kitchen the same sponge may want considerably longer, in a warm one less. Judge by the dome, not the clock.
The flour dredgeThe top is dusted with flour and then the trough closed with its lid. The recipe does not say why; a flour dusting helps keep the surface from drying and sticking to the cover.
Ferment strength is unknownBecause No. 3410 governs how lively the ferment is, no conversion to modern packaged yeast can be given honestly. If you are working from commercial yeast or a mature sourdough starter, treat this as a sponge and let appearance decide.
YieldA barrel of flour carried through No. 3412 would give something on the order of a few hundred one-pound loaves, though the exact count depends on the water in the final dough, which this entry does not give. This entry alone produces nothing edible.

A Little History

Charles Ranhofer wrote The Epicurean (1894) out of some thirty years at Delmonico's in New York, and its bakery chapter is frankly industrial: it assumes a trough, a barrel of flour and a baker working through the night. Levain is simply the French word for leaven, and the ferment-leaven-dough progression Ranhofer sets out is the classic French bakery build, in which a small quantity of active yeast is stepped up through successively larger and stiffer sponges before the final mix hrough ferment, then a leaven that is itself a dough. Something like the method is often said to survive in modern bakeries in poolish and levain-levure builds, and it existed for a practical reason: nineteenth-century yeast was inconsistent and often weak, so a baker propagated his own vigour in stages rather than trusting a single addition. That the recipe stops without baking anything is characteristic of the book, which is organised as a reference for professionals expected to read the numbered entries in sequence rather than as a set of standalone recipes.