Cheese, Caerphilly

⚠ UNTESTED. A briefing.

Caerphilly is the outlier of this family and the easiest entry to it: young, high-moisture, lightly pressed, and BRINED rather than curd-salted. It is eaten at three weeks, where a cheddar is barely started.

⭐ Which shows how much of a “family” definition is really about aging intent. Caerphilly is made by essentially the cheddar sequence, stopped early at every stage — cooler cook, shorter cheddaring, lighter press, brine instead of curd salt — and the result is a completely different eating experience from a cheese it is technically a sibling of.

⚠ The story you will hear is that it was made for Welsh coal miners: the heavy salt replaced what they sweated out underground, and the thick rind gave them something to hold with coal-blackened hands while they ate the middle. It is a wonderful story and it is told everywhere.

🔴 I am recording it as tradition rather than as fact. It has the exact shape this collection has learned to be careful with — a vivid mechanism, a sympathetic group of people, a tidy moral, and no source. What is not in doubt is that Caerphilly was a Welsh cheese in a coal-mining region and that it is salty and young.

Ingredients

• 2 gallons whole milk (not ultra-pasteurised)
• 1/4 tsp mesophilic culture
• 1/2 tsp calcium chloride solution, if the milk is shop-bought
• 1/2 tsp liquid rennet, single strength, diluted in 1/4 cup cool unchlorinated water
• Saturated brine, calcium-adjusted — see Cheese Brine, Saturated
• Salt for dusting the rind, optional

Directions

Key ingredients

Salt

1. Warm to 90 F / 32 C, mesophilic culture, only 30-45 minutes to ripen — shorter than a cheddar.
2. Rennet at a flocculation multiplier of 3. Cut to 1/2 inch, rest, then stir gently while raising to just 92-94 F / 33-34 C over 20 minutes. ⭐ Barely a cook, which is the first thing keeping the moisture in.
3. Drain, and let the curd mat for only 20-30 minutes. Almost no cheddaring at all.
4. Mill coarsely — but do NOT salt the curd. 🔴 This is the family’s outlier and the diagnostic detail. Every other cheese on the hard-pressed page salts the curd directly; Caerphilly goes into brine like a gouda. Because it will only be eaten in a few weeks, there is no need to get salt evenly into a dense body — there is no dense body.
5. Press lightly: ~5 PSI for 30 minutes, flip; ~10 PSI for 6-8 hours. No more.
6. Brine 4-6 hours per pound, flipping partway.
7. Dry a day or two, then age at 50-55 F, 90% RH — humid. ⭐ A traditional Caerphilly grows a soft, powdery, greyish-white natural rind, which is expected and is part of the cheese. Brush it back if it gets thick; do not try to eliminate it.
8. Eat at 3 weeks for the fresh, lemony, crumbly-moist version most people mean by Caerphilly. ⭐ Or leave it 2-3 months and it becomes something else entirely — the paste breaks down under the rind and goes soft and mushroomy while the centre stays chalky. Both are correct, and the second is what the Somerset makers who kept the cheese alive are known for.

Notes

Where this recipe came from — and what it isn’t 🔴 UNTESTED. Caerphilly is a generic name; there is a protected designation for the traditional Welsh farmhouse version.

🔴 Cheddaring is not pressing To cheddar is a specific operation, and it happens after the whey is gone and before the cheese goes anywhere near a press.

You drain the vat, let the curd knit into a solid slab, cut that slab into blocks, and then stack and re-stack the blocks, turning them, for one to two hours while they sit in their own warmth. The pile’s weight squeezes whey out, the acid keeps developing, and the texture changes completely.

⭐ The texture is the instrument. At the start you have a mass of fused curd. By the end it tears into fibres and looks, unmistakably, like cooked chicken breast. When it does that you are done — not when the timer says so. The pH at that point should be around 5.2–5.4, and this is the single best place in the whole section to own a meter, because “chicken breast” is a real instrument and a slippery one.

⚠ Caerphilly barely cheddars at all — the block above is here for context, and the recipe’s whole character comes from stopping short of it.

⚠ The miners’ cheese story Recorded above as what the tradition says about itself, not as established fact. ⭐ The shape of the claim is the problem rather than its plausibility: a salty cheese in a mining district is entirely believable, and “the rind was a handle” is the kind of detail that gets added to a true story later and then repeated as its core.

⭐ The cheese nearly died, and Somerset saved it Welsh Caerphilly production largely collapsed in the twentieth century — wartime rationalisation pushed dairies toward long-keeping cheeses, and a three-week cheese is exactly what a rationing system does not want. Production moved to Somerset, where it survived, and it was later revived in Wales. ⚠ So a great deal of “Welsh” Caerphilly has an English chapter in the middle of its history, which is worth knowing and is not a slight on it.

Read alongside /cheese/makes/hard-pressed-cheddar/ on the site.