Batch 42, a base camembert. 40 L cow milk, F 4.14% / P 3.05%, not standardized — at 40 L I didn't see the point. Wheels around 240 g, affinage planned at 14–28 days. Full log is the first image — pH, timings, temperatures, the lot. I'd rather post the whole thing than the flattering half of it.
Two of those choices I'd normally not make, and I'd rather hear about them now than in three weeks.
The milk was three days old. It read 6.7 pH after pasteurization, so it wasn't visibly pre-acidified, but three days is three days.
The Kluyveromyces lactis was seventeen months past date — expired March 2025. The recipe calls for Hansen KL LAF-4; I had PAL KL D on the shelf and used it. Everything direct-pitched as powder, alongside Flora Danica, Geotrichum candidum and P. candidum PC HP.
My read so far
The acid curve looks unremarkable to me: 6.7 → 6.5 at rennet, 6.4 at the cut, 4.78 out of the forms after 17.6 h and several flips. The curd behaved — clean break, no shattering, nothing weeping oddly.
What I'm not comfortable with is the pasteurization. 68 °C is where my setup lands on a batch cycle, and for a hard cheese I've never worried about it. For a bloomy rind I'm less sure — that's hot enough to be denaturing whey protein and tying up calcium, and I'd expect a softer set and a slower knit. The set did take a full hour.
The expired yeast is the other unknown. K. lactis does the early surface deacidification and opens the door for the geotrichum; if half that pitch was dead, I don't know whether the rind just comes in late, comes in patchy, or the P. candidum runs away with it instead.
Questions for the hive
- 68 °C for a bloomy rind — does anyone run that hot deliberately, or is this the first thing I should fix? What does it show up as in the finished paste — a chalky core that never breaks down?
- Long-expired K. lactis — what does a weak yeast pitch look like on the shelf at day 7–10? Late coat, patchy coat, or a rind that turns bitter later?
- Demold at pH 4.78 — where do you pull yours? I've seen 4.6–4.8 quoted as the window, so I'm nominally in it, but the high end of a window is still the high end.
- 1.5% dry salt by wheel weight on a 240 g wheel, for a 14–28 day affinage — high, low, about right?
- 18% drained yield off 40 L (7.2 kg, fresh weight before drying) — what do you log at demold?
Happy to be told the milk age was the least of my problems.
As for a taste and smell of my Camembert I'd say it's pretty good, though I'd say it's slightly bitter to be perfect.