Cacio e pepe is a Roman pasta made with Pecorino Romano, black pepper, and starchy pasta water, which combine into a glossy sauce without cream. The few ingredients make it quick, but the order and temperature matter: add the cheese off the heat so it melts smoothly instead of clumping.
Ingredients
- 12 oz (340 g) spaghetti or tonnarelli
- 6 oz (170 g) Pecorino Romano, very finely grated, plus a little extra for serving
- 1½ tsp (3 g) whole black peppercorns, freshly cracked, or 1 tsp (2 g) coarsely ground black pepper
- 4 qt (3.8 L) water for cooking the pasta
- 1 tbsp (18 g) fine salt for the pasta water, or less if your cheese is especially salty
- 1½ cups (360 ml) pasta cooking water, reserved as needed
Instructions
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Grate the Pecorino Romano as finely as you can, using the small holes on a box grater or a microplane. Finely grated cheese melts more readily than thick shreds. Set it in a bowl near the stove. Crack the peppercorns coarsely with a mortar and pestle or the bottom of a heavy pan; you want small pieces, not powder. Measure the pasta and salt before heating the water, because the sauce comes together quickly once the pasta is cooked.
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Bring 4 qt (3.8 L) water to a boil in a large pot. Add the salt, then the pasta. Stir during the first minute to help prevent sticking. Cook until just shy of al dente, usually about 1 minute less than the package time; check the package because thickness and shape change the cooking time. Before draining, scoop out at least 1½ cups (360 ml) of the starchy water. Do not rinse the pasta.
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While the pasta cooks, warm a large skillet over medium-low heat. Add the cracked pepper and toast it dry for about 30 seconds, stirring, until fragrant. Keep it moving and lower the heat if it starts to scorch; burnt pepper tastes bitter. Ladle in about ¾ cup (180 ml) of the pasta water. It will bubble and release the pepper’s aroma. Turn the heat to low while you finish the pasta.
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Transfer the pasta directly from the pot to the skillet with tongs. Toss it in the pepper water for 1 to 2 minutes, letting it finish cooking and absorb some of the liquid. If the pan looks dry before the pasta is tender, add another splash of pasta water. The noodles should be glossy and surrounded by a little loose liquid, not sitting in a deep pool.
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Take the skillet off the heat and wait about 30 seconds. Add a small splash of pasta water to the grated cheese and stir it into a thick, smooth paste. If it seems dry or grainy, add water a teaspoon at a time. Making this paste first helps the cheese disperse evenly rather than landing in the hot pan in clumps.
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Add the cheese paste to the pasta a little at a time, tossing continuously with tongs. Add more reserved pasta water in small splashes until the sauce coats the noodles. The exact amount varies with the pasta and cheese, so stop when the sauce looks creamy and clings to the strands. If the cheese refuses to blend, keep the pan off the heat and toss; direct heat is more likely to make it stringy or grainy.
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Taste a strand before adding any more salt. Pecorino is naturally salty, and the cooking water has already seasoned the pasta. Serve immediately in warm bowls with extra Pecorino and a little more cracked pepper. The sauce thickens as it stands, so bring any remaining pasta water to the table in case someone wants to loosen a serving.
Tips
- Grate the cheese finely. Fine, fluffy cheese melts more easily than thick shreds. Avoid pre-grated cheese if possible: anti-caking agents can interfere with a smooth sauce. Buy a wedge of Pecorino Romano and grate it shortly before cooking for the most reliable texture.
- Keep the pan off the heat when adding cheese. High heat is the most common cause of clumps. The pasta and pan retain enough warmth to melt the cheese as you toss. If the sauce cools too much, briefly return the pan to the lowest heat while stirring, then take it off again as soon as it loosens.
- Use pasta water a little at a time. Its starch helps the cheese and water form a coating, but too much at once can make the sauce thin. Reserve more than you expect to need, then add small splashes until the sauce turns glossy. If you accidentally add too much, toss over very low heat for a short time to reduce it.
- Choose a practical cheese substitute thoughtfully. Pecorino Romano is the traditional choice and has a sharp, salty, sheep’s-milk flavor. In a pinch, use finely grated Parmigiano-Reggiano; it makes a milder, less tangy sauce and may need slightly more pepper. A mix of the two is a useful middle ground, but it changes the classic flavor.
Serving Suggestions
Serve cacio e pepe as soon as it is made, while the sauce is fluid and the noodles are hot. A simple green salad dressed with olive oil and vinegar makes a fresh contrast to the salty, rich pasta. You could also offer sautéed greens, such as spinach or chard, on the side. Keep accompaniments fairly simple so the pepper and Pecorino remain the focus.
This pasta works as a satisfying main course for four, or as a first course alongside a larger Italian-style meal. Put extra grated cheese and cracked pepper on the table, but let everyone season their own portion; the sauce is already well seasoned. Bread is optional, but a piece of crusty bread can help scoop up any sauce left in the bowl. Avoid leaving the finished pasta in the skillet while other dishes are prepared, because the sauce will tighten as it cools.
Variations
Roman cacio e pepe is built around pasta, Pecorino Romano, and black pepper, but cooks differ on the pasta shape and small details of technique. Tonnarelli, a square-cut fresh egg pasta, is a familiar Roman choice. Dried spaghetti is easier to find and works well here; bucatini is another option, though its thicker shape may need a slightly longer cooking time. Follow the package directions and rely on the texture of the pasta rather than the clock alone.
For a more pepper-forward version, increase the cracked pepper to 2 tsp (4 g), tasting as you go. For a gentler result, begin with 1 tsp (2 g) and pass more pepper at the table. You can also use a blend of Pecorino Romano and Parmigiano-Reggiano, such as 4 oz (113 g) of each. The blend is less sharp and somewhat less salty, so taste before serving rather than automatically adding salt.
Some home cooks use a small bowl to make a cheese-and-water cream before tossing it with the pasta; others emulsify the cheese directly in the pan. The paste method in this recipe is a dependable approach for a home stove. Cream, butter, and garlic are sometimes added in adaptations, but they are not needed for the traditional three-ingredient flavor and will make the result a different, richer pasta.
Storage and Reheating
Cacio e pepe is best eaten immediately because its cheese sauce firms up as it cools. If you have leftovers, refrigerate them within 2 hours in a covered container and eat within 3 to 4 days. The sauce may become clumpy or absorb into the noodles in the refrigerator; that change in texture is normal. For the best result, store any extra reserved pasta water separately if you have it, but do not leave cooked pasta or sauce at room temperature to preserve it.
Reheat a portion gently in a skillet over low heat with 1 to 2 tbsp (15 to 30 ml) water per serving, tossing often until warm. Add another small splash if the noodles remain stiff. A microwave also works: cover loosely, heat in short intervals, and stir between them with a teaspoon of water added as needed. The reheated sauce may not be quite as silky as freshly made, so avoid high heat, which can make the cheese separate. Freezing is not recommended because thawing tends to leave the pasta and sauce grainy.
Frequently Asked Questions
Why did my cheese turn into clumps?
The pan or pasta was probably too hot when the cheese went in, or the cheese was grated too coarsely. Take the pan off the heat before adding the cheese, wait briefly, and toss continuously. A smooth cheese paste made with a little pasta water also helps. If clumps have already formed, low heat and small splashes of water may improve the sauce, though they may not disappear completely.
Can I make cacio e pepe without Pecorino Romano?
Yes, but the flavor will change. Finely grated Parmigiano-Reggiano is the easiest substitute and produces a milder, less salty sauce. You can also combine it with Pecorino if you have a smaller piece of the latter. Avoid soft or pre-shredded cheeses, which may melt differently and are less likely to make the smooth coating this dish needs.
Is pasta water really necessary?
Yes, it is central to the sauce. The water carries starch from the pasta, helping the cheese and liquid cling to the noodles rather than separating into dry cheese and a puddle. Reserve it before draining, and add it in small amounts. Plain hot water can loosen the sauce in a pinch, but it will not emulsify as effectively.
Can I prepare any part of the recipe ahead?
You can grate the cheese and crack the pepper a few hours ahead, then keep them covered separately in the refrigerator or at room temperature for a short time. Do not cook the pasta in advance if you want the best texture. The sauce is quick to finish, and it is much easier to get a smooth result when the pasta is hot and the starchy cooking water is fresh.
What should I do if the sauce is too thick?
Toss in reserved pasta water a tablespoon at a time until the sauce loosens and coats the noodles. If you have already discarded the pasta water, use a small amount of hot water, though the sauce may be less glossy. Add liquid gradually: a large pour can thin the sauce more than you intended.
Can I use pre-ground black pepper?
Yes. Freshly cracked pepper has a stronger aroma and a more varied texture, but pre-ground pepper is a workable substitute. Start with 1 tsp (2 g), toast it briefly in the skillet, and taste before adding more. Very fine pepper can taste more intense, so increase it in small pinches rather than replacing the full amount automatically.
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