Fill your largest pot with water and salt it generously — it should taste like seawater. Bring to a rolling boil over high heat.
In a large mixing bowl, whisk together the egg yolks, whole egg, grated cheese, and black pepper until well combined. This mixture will create your sauce base.
Heat a large skillet over medium heat and add the diced pancetta. Cook, stirring occasionally, until the fat renders out and the pieces turn golden and crispy. Don't rush this — proper rendering is crucial for flavor.
⏱ 8 min
Drop the spaghetti into the boiling water and cook according to package directions until al dente. The pasta should have a slight bite when you test it.
Before draining, scoop out 1 cup of the starchy pasta cooking water and set aside. Then drain the pasta completely.
Working quickly, add the drained hot pasta directly to the skillet with the pancetta. Toss everything together so the pasta picks up the rendered fat and crispy bits.
Pull the skillet off the heat immediately, then pour in the egg mixture while vigorously tossing the pasta with tongs. The residual heat will gently cook the eggs without scrambling them.
Keep tossing while gradually adding the reserved pasta water, a splash at a time, until a glossy, creamy sauce coats each strand. This should take about 2 minutes of constant motion.
⏱ 2 min
Plate immediately and pass extra grated cheese and freshly ground pepper at the table. Carbonara waits for no one — serve it while it's steaming hot.