5-Ingredient Pesto Pasta
Some nights you just need dinner, fast, and this is my answer. Five ingredients, twenty minutes, and a bowl of silky, garlicky pesto pasta that tastes far more special than the effort suggests. It is the recipe I fall back on when the fridge is bare and everyone is hungry.
The one trick that takes it from good to great is a splash of starchy pasta water, which loosens the pesto into a glossy sauce that clings to every strand.
For more quick dinners, try my creamy Tuscan chicken pasta, or the 30-minute skillet chicken.
Why this recipe works
Reserving starchy pasta water and loosening the pesto with it emulsifies the sauce so it coats the pasta silkily instead of sitting in clumps. Tossing off the heat keeps the pesto fresh and green rather than dull and oily. Good pesto and parmesan do the flavour work.
What you'll need
Just five things — so make them good:
- Pesto: a good-quality jar or fresh; it is the main flavour, so choose one you like.
- Pasta: any shape; reserve some cooking water before draining.
- Parmesan: freshly grated melts in and adds savoury depth.
Smart swaps: add cherry tomatoes, peas or rocket. Stir in cooked chicken or prawns to make it a fuller meal. Use any pesto — basil, rocket or sun-dried tomato. A squeeze of lemon brightens it.
5-Ingredient Pesto Pasta
Fast, fresh 5-ingredient pesto pasta. Serves 4.
Ingredients
- 400 g pasta
- ¾ cup (180 g) pesto
- ½ cup (50 g) parmesan, grated
- 2 tbsp olive oil
- Fresh basil to serve
Method
- Cook the pasta in well-salted water until al dente. Reserve 1 cup of the cooking water, then drain.
- Return the pasta to the warm pan, off the heat.
- Stir in the pesto, parmesan and olive oil, adding splashes of pasta water until silky.
- Toss until the sauce coats every strand.
- Serve with extra parmesan and fresh basil.
Step by step
Step 1 — Cook and reserve water
Cook the pasta in well-salted water and, crucially, scoop out a cup of the starchy water before you drain. That water is the secret to a silky sauce.
Step 2 — Toss off the heat
Stir the pesto through off the heat so it stays fresh and green, loosening with splashes of pasta water until it turns glossy and clings.
Step 3 — Finish and serve
Add parmesan and a little more water if needed, then serve with fresh basil. Quick, fresh, and genuinely satisfying.
Pro tips
- Save pasta water. It is the key to a silky, clinging sauce.
- Toss off the heat. This keeps the pesto fresh and green.
- Salt the pasta water well. It seasons the pasta from the inside.
- Use good pesto. With so few ingredients, quality shows.
- Add water gradually. A splash at a time until glossy.
Storage & make-ahead
Best eaten fresh, but leftovers keep in the fridge for up to 2 days. Reheat gently with a splash of water or oil to loosen the pesto, which can dry out. It is also lovely cold as a pasta salad, so leftovers make an easy lunch.
Variations & substitutions
- With protein: stir in cooked chicken or prawns.
- Veg-packed: add cherry tomatoes, peas or rocket.
- Creamy: swirl in a spoonful of cream cheese or ricotta.
- Smaller batch: use the ½x scaler for two.
Frequently asked questions
Why add pasta water?
Its starch helps the pesto emulsify into a silky sauce that clings to the pasta instead of clumping.
Should I heat the pesto?
No — toss it through off the heat to keep it fresh and green. Cooking pesto dulls the colour and flavour.
Can I make it a full meal?
Yes — add cooked chicken, prawns, or plenty of vegetables and beans.
What pasta shape is best?
Any works. Long shapes like spaghetti or short ones like fusilli both hold pesto well.
Final thoughts: this is the dinner that has saved countless busy evenings for me, and it never feels like a compromise. Make it your own with add-ins and tell me your go-to over on the contact page.
For the science of emulsifying pasta sauces, Serious Eats has a brilliant guide.
About Aisha
I'm a self-taught home cook who writes recipes the honest way — refined until they genuinely work, with no shortcuts and no fake awards. More recipes by Aisha →
