Living culture

Levain One.

Alive. Tangy. Ridiculously reliable.

Adopt yours Watch it rise

Now with 400 million wild yeasts.

Jar 01 · 100% hydration · 21–24°C

A house culture with the manners of a product. Levain One shows up awake, already tangy, and willing to keep a schedule. Feed it when the notes say. Bake when the dome is proud. Hand a spoonful to a neighbor and the line keeps going.

Inside the glass

What lives in the jar.

Four behaviors, one colony. The last one is a joke. The feeding is not.

See the feeding schedule

Wild Yeast Engine™

A steady colony of wild yeast and lactic bacteria. It keeps the dome on the clock you were promised.

Colony · stable

Adaptive Tang

Bake it young and the loaf stays gentle. Give it another day and the tang speaks up. Same jar, two moods.

Mild, then bright

All-Day Rise

The peak holds across a four-to-eight-hour window. Wide enough for a commute, a meeting, and a second coffee.

Window · 4–8h

Zero-Maintenance Mode

Just kidding, feed it. A weekend in the fridge is as hands-off as a living thing gets. Monday morning, it is ready to be hungry again.

Status · hungry

Spec sheet

One jar, fully specified.

No mystery flour. No secret water. A label you could print and tape to the lid.

100% Hydration
4–8h Peak rise
Infinite Generations
1 Jar

Hours 0–12

Twelve hours in the jar.

From the feed to the bake, the line climbs. Four chapters, one colony, no speeches.

Feed

Hour 0. Equal weights of flour and water, a brief stir, a loose lid. The surface is flat and the colony is awake.
Rise

Hour 4. Bubbles stack into a soft dome. The kitchen starts to smell like warm grain and green apple.
Peak

Hour 8. The jar is proud and the rise line holds. This is the window. Bake, or tuck it in the fridge if the day got away.
Bake

Hour 12. Take what the loaf needs. Leave a spoonful, feed it again, and the generations continue with a little more confidence.

Editions

Two ways to carry it.

L1-Mini

Levain One Mini

The same colony, packed for a weekend. Forty grams, a tight lid, and a slightly smug sense of preparedness. A joke travel jar, until you actually leave town.

Reserve the Mini

L1-Rye

Rye Edition

Fed on whole rye. Darker, hungrier, and a little more serious about breakfast. The rise is slower and the tang stays through dinner.

Reserve Rye

Care guide

Feed it like you mean it.

A living product still has a manual. Nothing here is secret. Weigh it, stir it, leave it alone.

Open the schedule

Flour

Wheat, 11–13% protein.

Water

Room temperature. Dechlorinated if you can.

Ratio

1 : 1 : 1 starter, flour, and water, by weight.

Temperature

21–24°C on the counter.

Weekend

Loose lid, the fridge, a little patience.

Discard

Keep a scrap. Share a scrap. Bake the rest.

feeding.schedule

kitchen@counter:~$ feed --week

mon  discard to 40g
     +40g flour
     +40g water
tue  rest at 22°C
wed  peak check, hours 4–8
thu  bake, or hold the line
fri  counter, if you bake daily
sat  fridge, if you leave town
sun  bring it back to the counter

# zero-maintenance mode
# command not found. feed the jar.

Bring one home

Adopt yours.

Name yourself and the kitchen. Nothing ships. The confirmation is still sincere.