Cacio e pepe is three ingredients: pasta, pecorino, pepper. Roman cooks have been making it for a very long time, and the whole tradition rests on the idea that when you take everything else away, what is left has to be good.
Most recipes online spend their word count on the emulsion, which is fair because that is where the dish goes wrong. Almost none of them talk about the pepper, which is odd, because pepper is one of only two things you taste. Half the flavor of a famous dish comes from a jar most people have not replaced since they moved in.
Swap in fresh Kampot black and the difference is not subtle. You get eucalyptus and citrus over the heat instead of the flat dusty burn of pre-ground pepper. The dish stops tasting like buttery pasta with a sneeze in it and starts tasting like the thing Romans have been defending for generations.
What you need
Serves 2. About 20 minutes.
- 8 oz spaghetti, tonnarelli, or bucatini
- 1 tablespoon Kampot black peppercorns, plus more for finishing
- 4 oz Pecorino Romano, grated as finely as you can manage
- Kosher salt for the pasta water
That is the whole list. There is no butter, no cream, and no olive oil in a traditional cacio e pepe. Fat comes from the cheese.
Method
- Grate the cheese first. Use the smallest holes on your grater, or a microplane. Coarse shreds are the single most common cause of a broken, stringy sauce. Set the cheese aside in a wide bowl and let it come to room temperature while you work.
- Boil the pasta in much less water than usual. For 8 oz of pasta use about 1.5 quarts, just enough to submerge the strands, and salt it lightly. Stir often so nothing sticks. Less water means starchier water, and starch is what keeps the cheese from clumping. Cook the pasta 1 minute short of al dente.
- Toast the pepper. While the pasta cooks, crack the peppercorns coarsely. Toast them in a dry skillet over medium heat for 30 to 45 seconds, until you can smell them clearly across the kitchen. Add a ladle of pasta water to the skillet and let it bubble for a minute. This is your pepper broth.
- Make the cheese paste. Ladle a few tablespoons of pasta water into a wide cup and let it sit for 2 to 3 minutes. It should feel hot to a fingertip but not scalding. Stir it into the bowl of grated pecorino a little at a time, working hard with a fork, until you have a thick smooth paste about the texture of wet sand. If it seizes into clumps, the water was still too hot.
- Combine off the heat. Drag the pasta straight from the pot into the skillet with the pepper broth and toss for a minute to finish cooking. Then pull the skillet off the burner completely and give it a full minute to drop below the danger line before you add the cheese paste. Toss hard and continuously, adding splashes of the cooled pasta water until the sauce turns glossy and clings to every strand.
- Serve immediately in warmed bowls, with a final crack of pepper over the top. Cacio e pepe waits for no one.
Notes from our kitchen
- Heat is the enemy at the end. Pecorino clumps above roughly 150°F, a number a 2025 study in Physics of Fluids actually pinned down after decades of Roman cooks knowing it by feel. Everything about the last step is designed to keep the cheese below that line. If your sauce turns into a rubber ball in the pan, the pan was too hot.
- The failure-proof version: the same study found pasta water alone often does not carry enough starch to stabilize the sauce. Dissolve 1 teaspoon of cornstarch in a few tablespoons of water, stir it into the cheese paste, and the emulsion stops being a coin flip. Purists will object. It works.
- Rescue plan: a broken sauce usually comes back with a splash of cool water and vigorous tossing off the heat. Do not put it back on the burner.
- How coarse: medium-coarse for the toasted pepper in the sauce, and a fresh coarse crack over the finished bowl. The two textures give you background warmth and bright top notes in the same bite.
- Why not pepper from the shaker: pre-ground pepper has already lost most of its volatile oils, which is where the citrus and pine live. In a dish with two ingredients, that loss is the whole difference between good and forgettable.
- Toasting is optional but worth it. Thirty seconds in a dry pan wakes the oils up. Do not walk away, because the line between toasted and scorched is short.
Storage
Cacio e pepe does not keep and does not reheat. Make what you will eat. If you want the pepper flavor tomorrow, toast an extra tablespoon of cracked Kampot black and keep it in a small jar for eggs, roasted vegetables, or the next batch.