Cheese, Emmental-Style

🔴 I have made this one, and it came out with NO EYES AT ALL — closer to what I would call a Swiss cheddar. More work to be done, and I have written up the whole diagnosis on the family page, including four positions in three days, each narrower than the last, all left visible rather than tidied into the final one.

⭐ The short version, because it is the useful part. Eyes require Propionibacterium freudenreichii to eat the residual lactate and produce CO₂. No eyes means it never got going. And 🔴 you cannot have the taste without the gas — the same reaction produces propionate, which is the characteristic nutty sweetness. A hole-free Emmental has not merely lost its looks; it has lost the flavour that comes with them.

What is left on my list, after two facts from my own bench knocked out the exotic theory:

🔴 Cause 1 — no warm-room stage. The propionic fermentation needs 21–24 °C / 70–75 °F. My cave sits in the low fifties year-round. This is the most likely single answer, and it is a scheduling failure rather than a skill one. 🔴 Cause 3 — too acidic. “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.

⭐ Both leading candidates are fixable with equipment I already own: the converted fridge as a warm box, and a pH meter.

Ingredients

• 3 gallons whole milk (not ultra-pasteurised)
• 3/8 tsp thermophilic culture
• 1/8 tsp Propionibacterium freudenreichii — 🔴 a SEPARATE adjunct, see the notes
• 3/4 tsp calcium chloride solution, if the milk is shop-bought
• 3/4 tsp liquid rennet, single strength, diluted in 1/4 cup cool unchlorinated water
• Saturated brine, calcium-adjusted — see Cheese Brine, Saturated

Directions

Key ingredients

Salt

1. 🔴 Confirm your culture actually contains P. freudenreichii before you start. It is an adjunct, sold separately, and a blend labelled “Swiss-style” that lists only S. thermophilus and a lactobacillus contains nothing that makes CO₂. ⚠ This was on my own fix-list and it is the cheapest thing to check.
2. Warm to 90-92 F / 32-33 C, thermophilic culture plus the propionibacteria, ripen 45 minutes.

Rennet at a flocculation multiplier of 2.5-3. Cut to rice grain. Fore-work 10-15 minutes.

1. Cook to 125-130 F / 52-54 C over 30-40 minutes, stirring throughout, then hold and stir 30-60 minutes. ⚠ Do not overshoot — excessive cook temperature is a documented cause of propionibacteria failing to grow.
2. Drain under the whey, gather in cloth, press HARD: ~10 PSI 30 min → ~20 PSI 2 hrs → ~25-30 PSI 12-18 hrs. Completely closed rind.
3. Brine 12-24 hours per pound. ⚠ Salt LIGHTER than instinct suggests — propionibacteria are salt-sensitive and heavy brining suppresses them. That was also on my list.

🔴 NOW THE THREE-STAGE SCHEDULE, and this is the part nobody has room for

1. 1. Pre-ripening — 10–14 °C / 50–57 °F for 10–14 days. Rind forms, the cheese settles.
2. 2. THE WARM ROOM — 21–24 °C / 70–75 °F for 3 to 6 weeks. ⭐ The eyes form here and nowhere else. A cave held steadily in the low fifties will never make them, because that is not what those weeks are for. This requires a SECOND thermal environment, which a single cave does not provide — and it is the single strongest argument for owning both a cave and a convertible box.
3. 3. Cold room — 4–6 °C / 39–43 °F, for months to years, to STOP it before the gas cracks the wheel (the split defect).
4. ⭐ And expect small eyes. In a small format the gas pressure dissipates before the holes can grow large. Small eyes are a success. 🔴 No eyes is a fixable condition, not a verdict on your kitchen — I said otherwise on an earlier version of the family page and it was the wrong thing to tell somebody.

Notes

Where this recipe came from — and what it isn’t ⭐ I have run this make and it failed in a specific, diagnosable way, which makes this the only recipe in the alpine batch written from experience rather than from reading. 🔴 This is not Emmentaler AOP.

🔴 The cook is hot enough to kill your starter Alpine curd goes to 122–130 °F / 50–54 °C, which is well past the point where a mesophilic culture dies. So these cheeses require thermophilic cultures — Streptococcus thermophilus, Lactobacillus helveticus and relatives.

⚠ This is the substitution that ruins the most wheels in home cheesemaking. Put a mesophilic culture in an alpine recipe and you kill your own starter partway through the cook, acidification simply stops, and the recipe will not warn you.

What the hot cook buys is 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.

🔴 You cannot have the taste without the gas P. freudenreichii metabolises the lactate left by the starters, and one reaction produces propionate — the nutty-sweet flavour — and CO₂ — the eyes. ⭐ They are two outputs of a single reaction. An eyeless Emmental has lost the flavour along with the holes, which is why my wheel tasted like a Swiss cheddar rather than like a quiet Emmental.

⭐ The full diagnostic list is on the family page, and so is a theory I had to retire A 2015 Agroscope study found that hay microparticles act as nuclei for the CO₂ bubbles, and that eyes have been vanishing from commercial Emmentaler because milk got cleaner — the move from bucket milking to closed systems with fine filters. I put that at the top of my list. ⚠ Then two facts from my own bench knocked it down: my milk was raw, and it was bucket-collected — which is exactly the case Agroscope contrasts against. Cause 8 is struck off for my wheel, and the section stays on the page because it is true in general, clearly marked as not applying. /cheese/families/cooked-pressed-alpine/ has all four positions in sequence.

⭐ The wheels are enormous partly because of a customs rule A 19th-century export duty assessed per wheel rather than by weight, which rewarded making them as large as possible. A tax schedule is part of why Emmental is the size it is — one more entry in this collection’s ledger of cheeses shaped by paperwork.

Read alongside /cheese/makes/cooked-pressed-alpine/, /cheese/families/cooked-pressed-alpine/ and /cheese/aging/my-aging-fridge/ on the site.