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Martha's Chef Secret: Citric Acid

The Martha Stewart Show, February 2007

Guacamole can turn brown when left out, but by sprinkling it with a half-teaspoon of citric acid, it will keep its color brighter and longer. Keep in mind that citrus acid works wonders for all fruits and veggies that have a tendency to discolor.

Resource
Citric acid can be found at your local Whole Foods Whole Body Market, or www.herbalremedies.com.