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Does anyone out there have a trick for keeping freshly made pesto from oxidizing and going all army brown in 15 seconds? When storing any leftovers in the fridge, I top the pesto with a thin film of olive oil and this seems to work pretty well, but when I serve it tossed with pasta or spooned on a fresh tomato slice, it goes all funky in a hurry. It almost always stays a vibrant green when I order a dish with it in a restaurant, so I know there must be a trick....anyone? Thanks.

asked by Oui, Chef about 8 years ago

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anyone
added about 8 years ago

Blanch your fresh basil in hot water just for a moment. Cool under cold running water and then make pesto. Be sure to use your oil trick and keep it air tight when storing.

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TiggyBee
added about 8 years ago

DonnyG's answer is spot on. In addition to blanching the basil, I add fresh spinach too, for extra green.

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AntoniaJames
AntoniaJames

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added about 8 years ago

Yes, DonnyG is absolutely right. To my knowledge, there is no other way. ;o)

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Oui, Chef
added about 8 years ago

Thanks DonnyG, and to TiggyBee and AntoniaJames for their concurring opinions. I wondered if this might be the trick as I've blanched numerous other greens to help them keep their color, but always thought basil had to be kept raw for an authentic pesto taste / texture. Still got a bunch of basil in the garden, and will be putting this good advice to use tomorrow! Thanks again - S

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mrslarkin
added about 8 years ago

That is a great tip!!

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jdeslaur
added about 8 years ago

A spot of lemon juice?

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Hilarybee
added about 8 years ago

I blanch the basil leaves and put lemon juice and zest in the pesto. Sometimes I'll do half arugula/ half basil or half basil/half spinach.

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foodfighter
added about 8 years ago

Definitely a little spinach/parsley helps keep it green. Per Harold McGee here are a few other ideas.

-Use leaves only, not stems or stalks;
-Cook the pasta in water acidulated with lemon juice (1/4 cup per quart) or cream of tartar (1 1/3 tablespoons per quart). This prevents the basil enzymes from acting on brownable substances in the pasta, but makes the pasta tart;
-Use pine nuts, not walnuts.

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violist
added about 8 years ago

I remember a tip that I think Michael Chiarello mentioned years ago, which was to crush a plain Vitamin C tablet to a dust consistency and add that to your pesto. He claimed it would keep that vibrant color after months of being frozen or weeks of being refrigerated, and that it didn't affect the taste. He also added the thin film of evoo.as you've been doing.

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Kitchen Butterfly
added about 8 years ago

Oui Chef, just to add that lanching works a treat (already said) - but its the same trick you used on cilantro in your roasted red pepper soup. BTW, I discovered that the blanched cilantro has a more pronounced taste, something perhaps to do with the essential oils (if any) loosening.

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