Skip Nav
Grilled Cheese Roll-Ups Recipe
Grilled Cheese Dippers Will Delight Your Inner Child
Strawberry Tart Easy Recipe
Original Recipes
The Easiest Strawberry Tart You'll Ever Make
Chicken Pot Pie Soup Recipe
Chrissy Teigen
Chrissy Teigen's Chicken Pot Pie Soup Belongs in the Soup Hall of Fame

Why Avocados Brown

Burning Question: Why Do Avocados Turn Brown?

I recently took home a large batch of prepared guacamole from a party, hoping to make good use of it at home during my next taco night. But I opened the package for a quick bite, and within hours, the entire container of gaucamole had turned a dirty brown. What gives?

Guacamole is made from avocados, which are difficult to preserve fresh (or process effectively) due to their tendency to change color.

Avocados contain an enzyme called polyphenol oxidase, which, when exposed to oxygen, changes the chemical structure of avocado flesh, increasing the presence of melanins (yes, the same pigments that provide color in human skin).


Another discoloration you might encounter when cutting open avocados are occasional brown or black lines within the fruit's flesh. Those are nothing to worry about; they're found in fruit from young avocado trees, but are perfectly safe for consumption.

Do you hesitate to eat avocados once they've begun to oxidize? What measures do you take to prevent them from discoloring?

Source: Flickr User QuinnDombrowski

From Our Partners
Sparkling, Seltzer, Soda: A Primer on Carbonated Water
Burning Question: Why Does Pineapple Irritate Your Mouth?
Difference Between Carnitas, Carne Asada, and Al Pastor
What Is Ginger Beer? The Difference Between Ginger Beer and Ginger Ale
Difference Between Heavy Cream and Whipping Cream
How to Be Sure Your Avocado's Ripe
How Figs Are Grown
Shelf Life of Raw and Hard-Boiled Eggs
Brie vs. Camembert
How Long Can Wine Last After Opening?
What Is an Instant Pot?
Macarons vs. Macaroons
From Our Partners
Latest Recipes, Menus, Food & Wine
All the Latest From Ryan Reynolds