Cacio e Pepe
Four ingredients and one failure mode. The trick is temperature control — the cheese must never meet heat it can't handle.
- Prep
- 5m
- Cook
- 12m
- Total
- 17m
- Serves
- 2
- Effort
- Moderate
Method
| 100 g | 1 Grate as finely as you can 3m | 4 Combine into a thick paste 3m Off the heat. Above about 70°C the cheese proteins tighten and you get strings, not sauce. | 6 Toss off the heat until glossy, then serve immediately 2m If it seizes, add a splash of cool water and keep tossing — it usually comes back. | |
| 2 tsp | 2 Toast until fragrant, then crush 2m | |||
| 1/2 cup | 3 Reserve before draining 1m Cook the pasta in half the usual water so the starch concentrates. | |||
| 200 g | 5 Boil until just short of al dente 8m | |||
| 1 tsp | ||||
- 1
Grate as finely as you can
3m- Pecorino Romano 100 g
- 2
Toast until fragrant, then crush
2m- black peppercorns 2 tsp
- 3
Reserve before draining
1m- pasta cooking water 1/2 cup
Cook the pasta in half the usual water so the starch concentrates.
- 4
Combine into a thick paste
3m- from 1 Grate as finely as you can
- from 2 Toast until fragrant, then crush
- from 3 Reserve before draining
Off the heat. Above about 70°C the cheese proteins tighten and you get strings, not sauce.
- 5
Boil until just short of al dente
8m- tonnarelli or spaghetti 200 g
- salt for the water 1 tsp
- 6
Toss off the heat until glossy, then serve immediately
2m- from 4 Combine into a thick paste
- from 5 Boil until just short of al dente
If it seizes, add a splash of cool water and keep tossing — it usually comes back.
The failure mode
Cheese sauce is an emulsion held together by starch. Pecorino is mostly fat and casein; the starch from the pasta water coats the fat droplets and keeps them suspended. Push the temperature too high and the casein contracts, wrings out its fat, and you get a stringy lump in an oily puddle. There is no recovering an emulsion that has broken badly, so the whole method is arranged to avoid getting there.
Practically: build the paste off the heat, in a pan you have let cool for thirty seconds, and finish by tossing rather than simmering. The pasta itself carries all the heat the sauce needs.
Why less water
Standard advice — a large pot, plenty of water — is designed to keep pasta from sticking and to dilute the starch. Here the starch is the emulsifier, so you want it concentrated. Cook 200 g of pasta in about a litre of water and the resulting liquid is noticeably cloudy; that cloudiness is the sauce.
Notes
- Grate finer than feels necessary. Fine shreds dissolve; coarse ones melt into strings.
- Toasting the pepper is a real difference, not a flourish: the volatile compounds are heat-released, and a whole peppercorn crushed cold tastes flat by comparison.
- Pecorino Romano is sharper and saltier than Parmigiano. Substituting is fine, but cut the salt in the water further.