Cooked & Pressed — the Alpine Cheeses
Gruyère, Comté, Emmental, Beaufort, Appenzeller, Raclette, Sbrinz. The big wheels, the long ages, and the nuttiest, sweetest, most complex cheeses in the world.
This family is the answer to a set of constraints rather than a preference — and I find it the most coherent family in the whole taxonomy, because every single characteristic traces back to a mountain.
The constraints that made them
The Alps page tells the history; here is the technical consequence, which is that four separate pressures all pushed the same direction.
Short season, long winter. The cheese must survive from summer alp to spring, so: low moisture, long keeping.
Hard transport. Everything comes down a mountain track, so: fewer, denser, more valuable units.
Scarce salt, hauled uphill at cost, so: long-aged but comparatively low in salt — which removes one of your two main ripening brakes and forces you to lean on the others.
And herds too small to fill a wheel alone, so: cooperation, and the fruitière with its ledger.
Take away salt as a lever and you must control ripening some other way. The answer is the hot cook.
The hot cook, and what it requires
The curd is heated much higher than in a cheddar — well above the point where mesophilic cultures die. Which means these cheeses require thermophilic cultures: Streptococcus thermophilus, Lactobacillus helveticus and relatives, which are happy at those temperatures.
This is the substitution that ruins the most wheels. Use a mesophilic culture in an alpine recipe and you kill your own starter partway through the cook. Acidification stops, the cheese never reaches its target pH, and the recipe will not warn you.
What the hot cook buys: a much drier, more thoroughly contracted curd, which knits into a dense low-moisture body that can be aged for years without drying out or cracking.
The eyes, and why size is not optional
Emmental’s holes are the family’s most famous feature and the clearest example of everything having to agree.
Propionibacterium freudenreichii eats the lactate the starters left behind, and one reaction produces propionate — the characteristic nutty-sweet flavour — and CO₂ — the eyes. You cannot have the taste without the gas.
Which requires a deliberate three-stage schedule: initial ripening at 10–14 °C, then a warm room at 20–24 °C where the eyes actually form, then a cold room at 4–6 °C to stop it before the gas cracks the wheel — the split defect.
And the wheel must be big. In a small format the gas pressure dissipates before the holes reach full size, so you physically cannot make a proper Emmental small. Culture, temperature schedule and wheel size all have to agree, which is why this is the least improvisable family in the section.
The members
Gruyère. Swiss, dense, no eyes to speak of (despite the cartoon), aged 5–18 months and longer. Note that Le Gruyère AOP (Switzerland) and Gruyère (France, IGP) are both legitimate and different.
Comté. French Jura, made in fruitières to this day, ~500 litres of milk per wheel — which is why the cooperative had to be invented before the cheese could exist.
Emmental. The eyes, and the wheels made enormous partly by a 19th-century customs rule that assessed export duty per wheel rather than by weight.
Beaufort. Savoie, concave-sided from the traditional wooden hoop, intensely floral when made from summer alp milk.
Appenzeller. Swiss, washed with a herbal brine whose recipe is famously secret — so it straddles this family and the washed rinds.
Raclette. Made to be melted, and the melting is the point — the cut face is heated and scraped onto potatoes. A cheese whose entire design brief is flowing under heat.
Sbrinz. Swiss, aged hard enough to grate, and arguably belongs with the grating cheeses.
🔴 My Swiss had no eyes — and I was wrong about why that happens
I’ve made Swiss. Thermophilic cultures, the hot cook, the whole business. And it came out with no eyes at all — closer to what I’d call a Swiss cheddar. More work to be done.
Now, I had written on this page that a home-scale wheel “will not have Emmental’s eyes, and that’s physics rather than skill.” My own result looks like it confirms that.
It doesn’t, and I need to correct myself, because the distinction matters if you’re going to try again.
The wheel-size argument is real, but it is about eye size: in a small format the gas pressure dissipates before the holes can grow large, so you get small eyes. It is not an argument for no eyes at all. A total absence is a different failure, and the causes of it are almost all things you can fix.
Which means my “physics rather than skill” line was discouraging and wrong. Size limits how big the eyes get. It doesn’t stop them existing.
The diagnostic list, in the order I’d check it
Eyes require Propionibacterium freudenreichii to eat the residual lactate and produce CO₂. No eyes means it never got going. The candidates, most fixable first:
1. No warm-room stage, or not warm enough. The propionic fermentation needs roughly 21–24 °C / 70–75 °F, and low temperature simply slows the metabolism — less activity, less gas, fewer eyes. A cave held steadily at 52–54 °F will never make eyes, because that’s not what those weeks are for. This is the single most likely culprit for a home wheel, because it requires a second thermal environment that a single cave doesn’t provide.
2. No propionibacteria in the culture. They’re an adjunct, separate from the thermophilic starter. A “Swiss-style” recipe that only calls for S. thermophilus and a lactobacillus has nothing in it that makes CO₂.
3. Too acidic. Propionibacteria are inhibited by low pH, and a cheese that over-acidifies will not make eyes. ⭐ And this is my leading suspicion for mine, because of how it came out — “like a Swiss cheddar” describes a cheddar-ish acid profile as much as a texture. If the curd went further down the acid curve than an alpine cheese should, I inhibited the organism I was relying on. That’s a pH-versus-clock failure, and it’s exactly the sort of thing a meter would have caught.
4. Too much salt. Propionibacteria are salt-sensitive; heavy brining suppresses them. Too little, and you invite things you didn’t want instead.
5. Cooked too hot. Excessive cook temperature is a documented cause of propionibacteria failing to grow.
6. The odd ones, worth knowing they exist: residual antibiotics in the milk, elevated copper, bacteriophage disrupting the lactic fermentation so there’s insufficient lactate left to eat, and — neatly — some heterofermentative starters actively inhibiting propionibacteria.
7. And only then, wheel size, which caps how large the eyes get rather than whether they appear.
⭐ 8. Added later: nothing for the bubbles to form on
Every cause above is about whether the gas gets made. Writing the Switzerland page turned up a Swiss result that adds a completely different one: whether the gas has anywhere to nucleate.
A 2015 Agroscope study, with EMPA and Lucerne University, set out to explain why Emmentaler and Appenzeller have been developing fewer and smaller eyes over the decades. Their answer is that microparticles of plant origin — hay fragments — act as the nuclei that CO₂ bubbles form around. They dosed experimental cheeses with powdered hay from 0.0625 to 4 mg and followed them by computed tomography over 130 days; the dose relationship was “highly significant.”
🔴 And the reason eyes are vanishing is that milk got cleaner. The industry moved from milking in the stable into buckets to closed automated systems with fine-pored filters, which caused a “drastic reduction of solid microparticles in raw milk.”
So the holes were, in part, barn dust — and we filtered out the barn.
Why this belongs on my list: you can hit the warm room, the culture, the pH and the salt perfectly, generate plenty of CO₂, and still get no round eyes if the paste offers nothing for a bubble to start on.
⚠ Two limits, stated plainly. This was industrial Emmental from filtered milk with instrumented analysis; “put hay dust in your milk” is my inference, not their recommendation, and deliberately adding unspecified plant matter to raw milk has an obvious other side — see sanitation and safety.
🔴 Answered: raw cow’s milk, bucket-collected — which retires my own newest theory
I said the first thing to establish was what milk I used. It was raw cow’s milk.
That is not the answer I was hoping for, and the honest thing is to say so rather than quietly leave cause 8 sitting at the top of the list where I put it yesterday.
Raw milk pushes cause 8 down the list, because the obvious version of the nucleation story — supermarket milk has been stripped by processing — doesn’t apply to milk that came straight off a farm.
But it does not eliminate it, and the reason is worth getting right. Read the Agroscope finding again: their comparison was not raw versus pasteurised. It was stable-and-bucket milking versus closed automated systems with fine-pored filters — and the sentence that matters says the change produced “a drastic reduction of solid microparticles in raw milk.” Their whole study is about raw milk losing its nuclei.
So the question was never “was it raw?” It was “was it filtered?” — and those are completely different questions that I had collapsed into one. A modern farm running a pipeline milking system with an in-line filter produces raw milk with very few microparticles in it. A bucket in a stable does not.
⭐ Which turns cause 8 into a specific question to ask the farm: is the milk pipeline-collected, and does it go through a filter before it reaches me? If yes, this stays live. If it’s hand-milked or bucket-collected, cause 8 is effectively ruled out and I should stop thinking about it.
🔴 And the answer is: bucket. Cause 8 is out.
The milk was bucket-collected.
That is exactly the case Agroscope contrasts against — the traditional stable-and-bucket collection that retains the plant microparticles, before the industry moved to closed systems and fine filters and the eyes started disappearing. My milk had the nuclei. The gas had somewhere to form. Cause 8 does not explain this wheel, and I’m striking it off.
⭐ Worth being blunt about the arc, because it’s the useful part. I found a striking piece of Swiss research, put it at the top of my own diagnostic list, and then two facts from my own bench knocked it down in succession — raw weakened it, bucket killed it. The finding is real and it explains why commercial Emmentaler has fewer eyes than it used to. It just isn’t what happened here.
That is the ordinary way this goes, and I’d rather leave the whole sequence visible than quietly delete an idea that didn’t survive contact with the facts. The cause 8 section stays on this page because it’s true in general, clearly marked as not applying to my wheel.
So the list is now short
With cause 8 gone and the milk raw and unfiltered, the field is down to three, and two of them are things I did:
Cause 1 — no warm-room stage. My cave sits in the low fifties year-round and the propionic fermentation needs 21–24 °C / 70–75 °F. If I never gave the wheel a warm room, no amount of correct milk would have helped. This is the most likely single answer.
Cause 3 — too acidic. Still my leading suspicion on the evidence of how it tasted: “like a Swiss cheddar” describes an acid profile as much as a texture, and propionibacteria are inhibited by low pH.
Cause 6 — wild flora, which raw milk raises rather than lowers: a heterofermentative strain from the farm competing with the starter is a real possibility that pasteurised milk wouldn’t present.
Causes 1 and 3 are both fixable with equipment I already own — the converted fridge as a warm box, and a pH meter. That’s the whole plan, and it no longer has an exotic branch on it.
And with raw milk established, the leading candidates go back to being the ones I already suspected:
Cause 3 — too acidic remains my best guess, for the reason I gave: “like a Swiss cheddar” describes an acid profile as much as a texture, and propionibacteria are inhibited by low pH. Cause 1 — no warm room is the other, because a cave held steadily in the low fifties cannot run a propionic fermentation.
Both of those are things I did, not things the milk did. So the reframing I offered a day ago — a wheel with no eyes may be telling you about your milk rather than your skill — turns out probably not to apply to this particular wheel, and I’d rather retract it here than let it stand as comfort.
⚠ One caveat on raw milk that cuts the other way: raw milk carries its own flora, and a heterofermentative wild strain competing with the starter is a real possibility that pasteurised milk wouldn’t present. That’s cause 6 on the list above, and raw milk raises rather than lowers it.
The general point still stands for the general case — what’s in the milk explains more than people credit. It just isn’t the explanation here.
So what I’d change next time
Honestly stated as a plan rather than a result, because I haven’t run it yet:
- A real warm-room stage — which, given my cave sits in the low fifties year-round, means using the converted fridge as the warm box instead. That’s a genuine argument for having two spaces on different schedules rather than one big one.
- Confirm the culture blend actually contains P. freudenreichii rather than assuming “Swiss-style” includes it.
- Watch the pH and stop the acid where an alpine cheese wants it, not where a cheddar does.
- Salt lighter than instinct suggests.
Write down what milk it was·ask whether it’s filtered— both answered: raw cow’s milk, bucket-collected. Cause 8 is struck off. Nothing left on the plan depends on the milk.
If that produces eyes — even small ones — it settles which of the above was the problem, and I’ll say so here.
Making one at home
Honestly: this is the hardest family for a home cheesemaker, and not because the technique is subtle.
You cannot make the wheel big enough. Everything about these cheeses assumes a mass that a domestic batch cannot reach — the slow even ripening, the eye formation, the resistance to drying over two years. A 2 kg alpine-style wheel is a real and worthwhile cheese, but it is not a small Comté; it is a different thing with a similar recipe.
And the temperature schedule is demanding. A warm room at 20–24 °C is not something a cave held at 52–54 °F does — you need a second space, or a period where you deliberately run the cave warm and accept what that does to everything else on the shelves.
Which is a genuine argument for having both a cave and a fridge: the small box can be run to a different schedule than the room.
What is achievable and well worth doing: an alpine-style wheel with thermophilic cultures, a hot cook, a firm press and a year of patience. It will be nutty and sweet and good.
Its eyes, if you get them, will be small — that part genuinely is a consequence of scale rather than skill. But getting them at all is mostly a technique-and-milk problem rather than a size problem, and the section above is the checklist I’d work through. I said otherwise on an earlier version of this page and it was the wrong thing to tell somebody.
⚠ Amended twice, honestly, and the second amendment partly undoes the first. I originally said “physics rather than skill,” corrected that to “a technique problem, not a physics problem,” then added cause 8 — bubble nucleation, which is physics, just not the size physics I first blamed.
And then the milk turned out to be raw and bucket-collected, which retires cause 8 for this wheel entirely and puts the blame back on the acid curve and the missing warm room — both of which are technique.
Four positions in three days, each one narrower than the last, and I’d rather show the whole sequence than present the final one as if it had been obvious. The part that has survived every revision is the part that matters: no eyes is a fixable condition, not a verdict on your kitchen.
How to make one: Making alpine-style cheese — the hot cook, the press schedule, and the warm room nobody has.
Next: grating and extra-hard cheeses — the two-year patience problem.
Comments (0)