How Do You Stop Guac From Browning? - Chowhound
All featured products are curated independently by our editors. When you buy something through our retail links, we may receive a commission. If you’re watching the big game, guacamole is non-negotiable, and homemade is always best. But how do you prevent the dreaded brown guacamole—and how does packaged guac stay bright green? If you’ve ever cut open an avocado, you know it’s only a matter of time before it starts to turn brown. Even your homemade guac will discolor after a while. Why is that? Oxidation. In the same way sun exposure ages our skin, oxygen is the enemy of fruit that doesn’t want to brown. Specifically, avocados and other fruits have an enzyme called polyphenol oxidase. When it consorts with oxygen, brown pigments form in the green flesh. Hence, when you leave out freshly made guacamole or a cut-up avocado, it turns brown pretty quickly. But packaged guacamole always seems to be bright green upon purchase, despite having sat on the shelf for countless days. What’s up...