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How to Make Pesto

Learn how to make pesto with basil, garlic, nuts, Parmesan, olive oil, storage, browning fixes, common mistakes, troubleshooting, and FAQs.

Food & CookingEdited by Pramod Tiwari
2 min read

Quick Answer

To make pesto, blend fresh basil, garlic, nuts, Parmesan, lemon optional, and olive oil until saucy but not overprocessed. Taste for salt, cover with a thin layer of oil, and refrigerate promptly.

Ingredients and Tools

  • Fresh basil
  • Garlic
  • Pine nuts or walnuts
  • Parmesan
  • Olive oil
  • Salt
  • Lemon optional
  • Food processor or mortar

Safety Precautions

  • Refrigerate homemade pesto promptly because oil-and-herb mixtures are perishable.
  • Use clean jars and utensils.
  • Check nut and dairy allergies.
  • Do not store garlic-in-oil mixtures at room temperature.
  • Discard pesto with mold, off smell, or unsafe storage history.

Step-by-Step Instructions

  1. Step 1

    Wash and dry basil

    Dry leaves well so the pesto is not watery.

  2. Step 2

    Pulse garlic and nuts

    Break them down first for even texture.

  3. Step 3

    Add basil

    Pulse basil gently instead of running the machine too long.

  4. Step 4

    Add cheese

    Mix in Parmesan or another hard cheese if using.

  5. Step 5

    Stream in oil

    Add olive oil until the sauce reaches your preferred texture.

  6. Step 6

    Season

    Taste and add salt, lemon, or more cheese.

  7. Step 7

    Store safely

    Refrigerate in a covered container with a thin oil layer on top.

Practical Example

Example: Pulse garlic and walnuts, add basil and Parmesan, stream in olive oil, season with salt and lemon, then toss with warm pasta.

Common Mistakes

  • Using wet basil
  • Overprocessing until bitter
  • Adding too much garlic
  • Skipping salt
  • Leaving pesto at room temperature
  • Forgetting allergy concerns

Troubleshooting

Pesto turns brown

Use fresh dry basil, limit air exposure, add lemon, and cover with oil.

Pesto is bitter

Avoid overprocessing olive oil and balance with cheese or nuts.

Pesto is too thick

Add more olive oil or pasta water when serving.

Pesto tastes flat

Add salt, cheese, lemon, or toasted nuts.

FAQs

Can I make pesto without pine nuts?

Yes. Walnuts, almonds, sunflower seeds, or no nuts can work depending on allergies and taste.

How do I store pesto?

Refrigerate promptly in a covered container and use safe food-storage judgment.

Can pesto be frozen?

Yes, freeze small portions for later use.

Why did my pesto turn brown?

Basil oxidizes when exposed to air; oil coverage and lemon can help slow browning.

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