Why Your Pasta Needs Its Own Cooking Water
When pasta cooks, it sheds a thin layer of starch into the water. That starch is the secret behind the glossy, clinging sauces you taste at trattorias in Rome and Bologna. Without it, your sauce slides off the noodles instead of hugging them.
A few practical rules: salt the water heavily so it tastes like the sea, scoop out a half cup of starchy water before draining, and finish your pasta in the pan with the sauce, splashing in the reserved water as you toss. The sauce thickens, emulsifies, and clings.
Try this with a simple aglio e olio. Toss the al dente spaghetti with garlic-infused olive oil and parsley, then add a quarter cup of pasta water and toss vigorously for 90 seconds. The transformation is immediate. Suddenly, three ingredients taste like a dish.