Cacio e Pepe is a simple yet irresistible pasta dish that combines the sharpness of Pecorino Romano cheese with the heat of freshly cracked black pepper.
Bring a large pot of heavily salted water to a boil. Cook the pasta until al dente according to package directions. Reserve 1 cup pasta water, drain and return the pasta to the pot, covered.
In a large deep skillet, toast the pepper until fragrant, about 1 minute. Add ½ cup pasta water on top of the pepper and bring to a simmer.
Reduce the heat to low, add the grated cheese and remaining pasta water and whisk until it comes together into a creamy glossy sauce. Toss the cooked spaghetti and the butter into the sauce until well combined.
Serve immediately with more freshly cracked black pepper, if desired.