Carbonara

Method

1. toast1 min
   dry pan, medium
   cracked black pepper alone in the wide pan until it smells resinous — pepper's aromatics are fat-soluble and volatile, so toasting them before any fat arrives is the difference between heat and perfume
2. fry8 min
   medium-low, starting from a cold-ish pan
   + guanciale, rendered slowly until the fat runs clear and the lean edges are gold but still yielding. Rushing it on high heat crisps the outside before the fat leaves the meat, and that rendered fat is the oil phase of the emulsion — without about 3 tbsp of it in the pan there is nothing for the egg to bind. Pull the pan off the heat when done.
3. whisk2 min
   room temperature
   egg yolks + whole egg + pecorino + a heavy grind of pepper into a stiff paste. It should look too thick to be a sauce; the grated cheese is doing double duty as thickener and emulsifier, and its casein is what keeps the fat and water from splitting later.
4. boil9 min
   rolling boil, salted lightly
   spaghetti in the salted water until just short of al dente. Salt the water less than you would for a tomato sauce — pecorino and cured pork are both aggressive. Reserve 1 cup of the starchy cooking water before draining; the dissolved starch is the third leg of the emulsion and plain water will not substitute.
5. temper2 min
   off the heat
   whisk 4 tbsp of the hot pasta water into the egg-cheese paste in a thin stream, one spoonful at a time. Egg proteins begin setting near 65 °C and the pan floor is well above 90 °C, so the paste has to be warmed and thinned before it ever meets the pan. Added all at once, or into a pan still on the flame, the yolks set into curds and no amount of stirring reverses it.
6. emulsify2 min
   off the heat, pan still hot to the touch
   drained pasta into the guanciale pan, tossed hard to coat every strand in the rendered fat, then + the tempered egg mixture and keep tossing and stirring. The residual heat alone thickens it; loosen with reserved pasta water a tablespoon at a time until the sauce clings and gleams rather than pooling. If it seizes or looks grainy it got too hot — a splash of cool water and vigorous stirring can sometimes pull it back.
7. top1 min
   plate immediately + remaining pecorino + more cracked pepper. Carbonara has a working life of about two minutes: it stiffens as it cools and cannot be reheated without breaking.