Pasta al Pesto Genovese

Method

1. Toast the pine nuts in a dry skillet over medium-low heat for 2 minutes, shaking frequently, until golden. Transfer to a plate immediately — they continue cooking in a hot pan.

2. Make the pesto. Combine basil, toasted pine nuts, garlic, and a pinch of salt in a food processor. Pulse 8–10 times until coarsely chopped. Add the Parmesan and pulse 3–4 more times. With the processor running, drizzle in the olive oil in a steady stream. Stop when the pesto is combined but still has visible texture — not a smooth purée. Stir in the lemon juice. Taste and adjust salt.

3. Cook the pasta in well-salted water until al dente. Reserve 1.5 cups of pasta water before draining.

4. Combine off heat. Transfer the hot pasta to a large bowl or skillet (off the burner). Add the pesto and 1/2 cup of pasta water. Toss vigorously — the heat from the pasta warms the pesto without cooking it, and the starchy water loosens it into a coating consistency. Add more pasta water until every strand is glossy and green.

5. Serve immediately with extra Parmesan. Pesto pasta doesn't hold — the sauce oxidizes and the pasta absorbs the moisture. Eat it now.

Equipment

• Food processor (or mortar and pestle for traditional method) Recommended: Cole & Mason Granite Mortar and Pestle
• Large pot (for pasta) Recommended: Lodge 6-Quart Enameled Cast Iron Dutch Oven
• Large skillet or bowl Also good: Tramontina Professional 10-Inch Non Stick Frying Pan
• Tongs Also good: Wok Spatula

Chef Notes

• The most important thing: Don't cook the pesto. It's a raw sauce — heat dulls the bright green color and the fresh basil flavor. Toss it with hot pasta off heat, using pasta water to loosen.
• Toast the pine nuts in a dry skillet until golden — 2 minutes, shaking constantly. They go from toasted to burned in seconds. Toasting deepens their flavor dramatically.
• Use the best olive oil you have. In a raw sauce with 5 ingredients, the oil's flavor is fully exposed. Cheap oil tastes like cheap oil.
• Pulse in a food processor, don't blend smooth. Pesto should have texture — visible bits of basil and pine nut. Over-processing makes it into a green paste.
• Pesto oxidizes (turns brown) within hours. Make it fresh and use immediately, or press plastic wrap directly onto the surface to prevent air contact.

Common Substitutions

Ingredient	Substitution	Notes
Pine nuts	Walnuts or almonds	Walnuts are earthier and cheaper. Almonds are milder
Basil	Arugula or spinach	Arugula pesto is peppery; spinach is milder. Both are good
Parmigiano-Reggiano	Pecorino Romano	Sharper and saltier — use 1/3 cup
Food processor	Mortar and pestle	Traditional method — produces a more rustic, textured pesto
Spaghetti	Trofie or gemelli	Trofie is the traditional Ligurian pasta for pesto

What You're Practicing

Pesto teaches you the raw sauce — a preparation where no heat is applied and the quality of each ingredient is fully exposed. The same principle applies to salsa verde, chimichurri, and gremolata. In raw sauces, technique means restraint: don't over-process, don't overcook, don't mask the ingredients. Visit Vinaigrettes for more on raw sauces.

You're also learning the mortar-and-pestle tradition — even if you use a food processor, understanding that pesto was originally pounded (pestare = to pound) connects you to the technique's origins. Explore more at Techniques.