ItalyQuality of olive oil is the whole recipe here. This dish has nowhere to hide a mediocre ingredient. Use the best extra-virgin you have — ideally something you'd happily dip bread into.
Start garlic in cold oil, not hot. Room-temperature or warm oil and the garlic hits a pan that's already too hot — it colours unevenly and the outside burns before the inside has softened.
Spaghetti Aglio e Olio
By Sergei Martynov
Spaghetti, olive oil, garlic, chili flakes, parsley. From pantry to table in 20 minutes. The pasta water is what turns the oil into a sauce — don't skip it.
Key Ingredients
What you'll need
Ingredients
- 400 g
See recipes with spaghettispaghetti
i - 80 ml
See recipes with extra virgin olive oilextra virgin olive oil, best quality you have
i - 8
See recipes with garlic clovesgarlic cloves, thinly sliced
i - 1 tsp
See recipes with red pepper flakesred pepper flakes
i - 4 tbsp
See recipes with fresh parsleyfresh parsley, finely chopped
i - 1 tsp
See recipes with saltsalt, for pasta water
i - 0.5 tsp
See recipes with black pepperblack pepper
i
How to make it
Instructions
- 1
Bring a large pot of generously salted water to a boil. The water should taste like the sea — this is where the pasta gets its flavour.
- 2
Add spaghetti and cook until 1 minute shy of al dente according to the package. Before draining, scoop out at least 250 ml of starchy pasta water and set aside.
- 3
While the pasta cooks, place the sliced garlic and olive oil in a cold large skillet. Set over medium heat. Cook slowly, stirring often, for 3–5 minutes until the garlic is golden and fragrant — not brown. The moment it smells ready, it's close. Brown garlic is bitter.
- 4
Add red pepper flakes and stir for 30 seconds. Pull the pan off the heat.
- 5
Transfer the still-slightly-undercooked pasta directly into the skillet using tongs — don't drain it completely. Add a full ladleful (about 120 ml) of hot pasta water. Return to medium heat.
- 6
Toss continuously for 1–2 minutes. The starch in the water emulsifies with the oil and coats every strand. Add more pasta water a splash at a time if it looks dry. The sauce should be glossy and just barely clinging to the pasta.
- 7
Remove from heat, toss in parsley and a grind of black pepper. Serve immediately in warm bowls.
Frequently Asked Questions
Why does my spaghetti aglio e olio turn greasy and the oil won't form a sauce — how to get a proper emulsion?
The pasta water is what makes it work. Oil and water don't mix on their own, but the starch dissolved in the cooking water acts as an emulsifier. Add a full ladleful of hot pasta water to the garlicky oil off the heat, then add the pasta and toss hard for 1 to 2 minutes. The mixture should go creamy and slightly thicken. If the oil still separates, either the water was too cold or you didn't add enough — try again with another splash.
Why does the garlic in spaghetti aglio e olio taste bitter — how to cook it without burning?
Bitterness almost always means the garlic burned. Always start sliced garlic in cold oil and only then set the pan on medium heat — it warms gradually and evenly this way. Aim for golden and fragrant, not brown. The moment you smell it, it's nearly done. If the pasta isn't ready when the garlic is, pull the pan off the heat and wait. You can always return it to warmth; you can't undo burnt garlic.
Should you add Parmesan to spaghetti aglio e olio or is that not authentic?
The traditional Roman and Neapolitan recipe contains no cheese — it's one of the rare Italian pastas where the dish is considered complete without it. Parmesan or pecorino can be added if you enjoy it, but it changes the character of the dish: heavier, richer, less clean. The authentic version finishes with nothing but parsley.
How much garlic for 4 servings of spaghetti aglio e olio?
4 to 6 cloves for a mild version, 8 to 10 for something with presence — personal preference. Traditionally the garlic flavour should be the point of the dish, not a background note. Slice thin rather than crush: crushed garlic burns faster and gives a sharper, more aggressive taste. Thin slices cook evenly and mellow as they colour.
Can you make spaghetti aglio e olio ahead or reheat it — why does it lose its texture?
This dish doesn't store or reheat well. The emulsion breaks as soon as the pasta cools — the oil separates back out and the noodles clump. A reheated version is noticeably different from a fresh one. Cook only what you'll eat immediately. With a 20-minute total time, there's no good reason to make it in advance.
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