Spaghetti black pepper, known in Italy as cacio e pepe, is a Roman classic that turns just three ingredients—pasta, Pecorino Romano cheese, and black pepper—into a silky, creamy sauce. The magic lies in the starchy pasta water, which emulsifies with the cheese and pepper to coat every strand. This version is simple, fast, and foolproof, giving you a restaurant-quality bowl in about 20 minutes.
Ingredients
- 12 oz (340 g) spaghetti (or bucatini, tonnarelli, or other long pasta)
- 1 1/2 cups (120 g) finely grated Pecorino Romano cheese (plus more for serving)
- 1 1/2 tsp (4 g) coarsely ground black pepper (plus more for serving)
- Kosher salt (for pasta water)
Instructions
- Bring a large pot of water to a boil. Add a generous handful of salt (about 1 tablespoon / 15 g) to the water—it should taste like the sea. Add the spaghetti and cook until al dente, about 1 minute less than the package directions (usually 8–9 minutes for dried spaghetti).
- While the pasta cooks, place the grated Pecorino Romano in a large mixing bowl. Add the coarsely ground black pepper to the cheese and toss to combine. Set aside.
- Just before draining the pasta, reserve about 1 1/2 cups (355 ml) of the starchy pasta water. Drain the spaghetti (do not rinse) and transfer it to the bowl with the cheese and pepper.
- Working quickly, add about 1/2 cup (120 ml) of the hot pasta water to the bowl. Using tongs or a wooden spoon, toss and stir vigorously to melt the cheese and create a creamy sauce. The heat from the pasta and water will melt the cheese. If the sauce looks too thick or clumpy, add more pasta water, a tablespoon at a time, until it becomes silky and coats the pasta evenly.
- Taste and adjust seasoning. The cheese is salty, so you likely won’t need extra salt. Divide among four plates or bowls, and top with an extra crack of black pepper and a dusting of Pecorino Romano if desired. Serve immediately.
Tips
- Use freshly grated cheese. Pre-grated cheese often contains anti-caking agents that prevent it from melting smoothly, leading to a gritty sauce. Grate Pecorino Romano from a wedge right before cooking.
- Don’t overheat the cheese. If the pasta water is boiling hot, the cheese may clump. Let the water sit for 30 seconds after draining, and add it gradually while tossing. The goal is a creamy emulsion, not scrambled cheese.
- Reserve more water than you think you need. The exact amount of starchy water varies depending on how much starch is released and how dry your pasta is. Having extra ensures you can adjust the sauce consistency.
- Toast the pepper (optional). For a deeper, more aromatic pepper flavor, heat the black pepper in a dry skillet over medium heat for 1–2 minutes until fragrant before adding it to the cheese. This is a common variation in Rome.
Serving Suggestions
Serve this spaghetti black pepper as a main course with a simple green salad dressed in lemon vinaigrette, or as a side to grilled chicken or roasted vegetables. It also pairs beautifully with a glass of dry white wine, such as Vermentino or Sauvignon Blanc. For a more filling meal, top with a few sautéed shrimp or a poached egg.
Variations
- Add butter. Stir in 1 tablespoon (14 g) of unsalted butter with the pasta water for a richer, slightly less sharp sauce.
- Use Parmigiano-Reggiano. Substitute half or all of the Pecorino with Parmigiano-Reggiano for a nuttier, less salty flavor.
- Add a touch of cream. For an ultra-creamy version (not traditional), stir in 2 tablespoons (30 ml) of heavy cream after the sauce comes together.
- Make it spicy. Add a pinch of red pepper flakes along with the black pepper for a subtle heat.
- Try a different pasta. While spaghetti is classic, this sauce works beautifully with tonnarelli, bucatini, or even rigatoni.
Storage and Reheating
This dish is best enjoyed immediately, as the sauce can become stiff and clumpy when cooled. If you have leftovers, store them in an airtight container in the refrigerator for up to 2 days. To reheat, place the pasta in a skillet over low heat with a splash of water or milk, and toss gently until warmed through. Avoid microwaving, which can make the cheese rubbery. Reheat leftovers to 165°F (74°C) to ensure safety.
Frequently Asked Questions
Why does my cacio e pepe turn into a clumpy mess?
Clumping usually happens when the cheese is added to water that is too hot, or when the cheese is pre-grated with anti-caking agents. Use freshly grated Pecorino, let the pasta water cool slightly for 30 seconds, and add it gradually while tossing vigorously.
Can I use black pepper from a shaker?
Yes, but freshly ground black pepper has much more flavor. The coarse grind is important because it releases the pepper’s oils and provides little bursts of heat. If using pre-ground, use about half the amount, as it is more potent.
What if I don’t have Pecorino Romano?
Parmigiano-Reggiano is the best substitute. It is less salty and nuttier, so you may need to add a pinch of salt to the sauce. A mix of Parmesan and a little extra salt works well too.
Can I make this vegan?
Yes. Use a high-quality vegan parmesan-style cheese (look for one that melts, like a cashew-based version) and add a tablespoon of nutritional yeast for umami. The sauce may be slightly less creamy; add a splash of unsweetened plant milk if needed.
How much pasta water should I use?
Start with 1/2 cup (120 ml) and add more as needed. The sauce should be glossy and coat the pasta, not be watery or thick. You may need up to 1 cup (240 ml) depending on your pasta and cheese.
Can I use whole wheat or gluten-free spaghetti?
Yes, but note that gluten-free pasta often requires more starchy water and can be more delicate. Cook it just until al dente and be gentle when tossing. Whole wheat pasta has a nuttier flavor that pairs well with the pepper.
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Safety notes: safe minimum internal temperatures from USDA FSIS; raw and undercooked fish guidance from the U.S. FDA. Food safety notes
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