1. Use onions. Chop up a quarter of a red onion in the bottom of a sealable container, and place the avocado flesh-side up on the bed of onion. The vapors from the onion will prevent the avocado ...

Here are more cool things lemon can do. Trick No. 3: Brush with oil Oil will also help oxygen from reaching the flesh of an avocado. Brush the exposed area with olive or vegetable oil to create a barrier, then seal in an airtight container—it should kee

What Makes an Avocado Turn Brown? To prevent the browning, it's important to understand what causes it in the first place. Some fruits and vegetables (apples, potatoes, avocados, and more) contain phenolic compounds and enzymes that, when exposed to o