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Pesto Penne

Fresh basil pesto loosened with starchy pasta water and tossed with hot penne off direct heat so the sauce stays aromatic and coats every tube.

Prep15 minCook15 minTotal30 minYield4 servingsLevelEasy

Source-reviewed. No original CookClue test is claimed unless it is actually recorded.

Penne coated in green basil pesto with pine nuts, Parmesan and basil

Before you start

What this method is trying to achieve

Pesto does not need a simmer. Blend the basil sauce separately, reserve pasta water, then toss pesto with the hot drained pasta away from direct burner heat. A little pasta water helps the pesto spread without becoming oily or clumpy.

Success looks like

Know the target before you cook

The pasta should be evenly green and glossy with basil aroma, no oily pool and no dense paste stuck in patches.

Ingredients

What you need

Pesto

  • 80 g fresh basil leaves — About 4 packed cups.
  • 2 cloves garlic
  • 60 g pine nuts, lightly toasted — About 1/2 cup.
  • 240 ml extra-virgin olive oil — About 1 cup; add gradually.
  • 90 g Parmesan, finely grated — About 1 cup.

Pasta

  • 450 g penne — About 1 lb.

Seasoning

  • kosher salt — To taste.

Method

Cook by the cues, not just the clock

Make pesto

  1. Pulse basil, garlic, salt and pine nuts until finely chopped. Stream in olive oil while processing just until a cohesive sauce forms.

Add cheese

  1. Pulse or stir in the Parmesan only until incorporated. Set the pesto aside away from direct heat.

Cook pasta

  1. Boil penne in salted water until al dente. Reserve about 240 ml / 1 cup pasta water, then drain without rinsing.

Toss off heat

  1. Put the hot pasta in a large bowl, add pesto and toss away from direct burner heat.

Loosen

  1. Add reserved pasta water a tablespoon at a time until the pesto spreads into a thin glossy coating. Finish with extra Parmesan if desired.

Critical checkpoints

Stop here and check

other

Pasta unrinsed and still hot?

The noodles retain surface starch and enough heat to loosen the pesto.

Do not rinse before tossing.

temperature

Pesto added off direct heat?

The sauce is warmed by the pasta rather than cooked in a pan.

Remove from burner before adding pesto.

other

Pesto oily or patchy instead of coating?

Oil separates or pesto stays in dense clumps while pasta remains bare.

Use CookClue's pasta-sauce-wont-cling diagnosis to check rinsing, starch and finishing.

If yours looks different

Route the failure before changing the recipe

The pesto separates into oil or clumps instead of coating the pasta evenly.Pesto won't cling? Diagnose surface starch, pasta water and finishing technique.

Why Won't My Pasta Sauce Stick to the Noodles?

After cooking

Storage, reheating & substitutions

Storage

Refrigerate promptly. A thin film of olive oil over extra pesto helps reduce surface oxidation.

Reheating

Pesto pasta is best warmed gently; high heat dulls basil aroma and can make the sauce oily.

Substitutions

Walnuts can replace pine nuts with a different flavor. Fusilli or trofie can replace penne.

Evidence

Sources & methodology

Technical claims and method decisions are tied to sources. Recipe-specific advice is not presented as a universal food-science law.

  1. PestoFood Network

    Food Network's pesto combines basil, garlic, salt and pine nuts, streams in olive oil and adds Parmigiano-Reggiano at the end.

    publisherPassage verified
  2. How to Make Pesto Step-By-StepFood Network Kitchen

    Food Network recommends tossing pesto directly with freshly cooked pasta rather than cooking the pesto, allowing residual pasta heat to release its aromas.

    publisherPassage verified