This recipe provides a simple yet authentic method for making Cacio e Pepe. Spaghetti is cooked to just under al dente, then combined in a skillet with butter, grated garlic, generous black pepper, and grated cheese. Reserved pasta water is used to create a classic, creamy, emulsified sauce.
The key to a successful Cacio e Pepe is emulsification. Ensure your pasta is undercooked slightly before adding it to the skillet; it will finish cooking in the sauce and release starch. Adding the cheese off the heat is crucial to prevent it from clumping or becoming greasy – the reserved starchy pasta water helps create a smooth, creamy sauce. Use freshly cracked black pepper for maximum aroma and flavor. Toasting the pepper briefly in the skillet before adding the garlic can further intensify its notes. Don't be afraid to add more pasta water, tablespoon by tablespoon, to achieve the perfect consistency.