Instructions
- Bring a large pot of water to a boil and salt it lightly — Pecorino and guanciale are both salty.
- Finely grate the Pecorino Romano and set aside.
- Cut the guanciale into thick strips or small chunks. Place in a cold skillet and turn heat to medium so the fat renders gradually. When the fat is translucent and the meat lightly golden, let it crisp 2–3 minutes.
- Remove the guanciale with a slotted spoon, leaving the rendered fat in the pan.
- Cook the pasta until al dente, draining about 2 minutes early. Before draining, add a ladle of starchy pasta water to the pan with the fat and stir.
- Transfer the pasta to the pan and toss over low heat to coat in the fat.
- Turn off the heat completely, then add the grated Pecorino and a small ladle of pasta water. Stir vigorously — the starch binds the cheese into a smooth, lump-free emulsion.
- When the sauce is velvety and coating the pasta, return the crispy guanciale and toss briefly.
- Finish with black pepper and serve immediately with extra Pecorino.