Sauce not clinging to pasta

What the cooking water does

Pasta releases starch into the water it boils in. That starchy water is a thickener and an emulsifier: it helps fat and water combine into a glossy sauce that coats each strand instead of running off it.

Draining pasta completely, tipping it into a bowl, and spooning sauce on top gives you two separate things sharing a plate. The fat and the water in the sauce stay separate, the sauce stays thin, and it slides.

The Italian term for the finishing step is mantecare — to bring the pasta and sauce together over heat, with a little pasta water, until the sauce thickens and clings. It takes about a minute and it changes the dish completely.

The finishing step

1. Salt the pasta water properly and use enough water — but not an enormous volume, or the starch is too dilute to be useful.
2. Before draining, take out a mugful of the cooking water. This is the step everybody forgets. Put a mug in the colander as a reminder.
3. Drain the pasta a minute before the packet says. It will finish in the sauce.
4. Have the sauce hot in a wide pan.
5. Tip the pasta into the sauce — never sauce onto pasta — and add a splash of the cooking water.
6. Cook them together over a medium heat, tossing or stirring constantly, for a minute or two. The sauce will visibly thicken and turn glossy and start to coat the pasta.
7. Add more pasta water a little at a time if it tightens too much. Finish with butter, oil or cheese off the heat and toss again.

Other reasons it slides

• The sauce is too thin to start with. Reduce it before the pasta goes in. Pasta water thickens; it does not rescue a watery sauce.
• The wrong shape. Thin smooth strands hold light oily sauces; ridged and hollow shapes hold chunky ones. A meat ragù on spaghetti will always fall off.
• Oil in the cooking water. It coats the pasta and stops sauce adhering. Do not add it.
• Rinsing the pasta. Washes the surface starch away entirely. Only ever do this for a cold pasta salad.
• Over-drained. A little water clinging to the pasta is useful.
• Too much sauce. Italian portions are far less saucy than British instinct suggests. The pasta should be coated, not swimming.

Shape and sauce

Long thin strands

Spaghetti, linguine, bucatini. Oil, garlic, seafood, cacio e pepe, carbonara.

Ridged tubes

Penne rigate, rigatoni. Chunky vegetable and meat sauces that lodge in the ridges and the hollow.

Twists and spirals

Fusilli, trofie. Pesto and anything that catches in the grooves.

Wide ribbons

Pappardelle, tagliatelle. Rich slow-cooked ragù.

Small shapes

Ditalini, orzo. Soups and brothy dishes.

Smooth tubes

Penne lisce. Harder to sauce than the ridged version, and less useful.

Common questions