Is It Dangerous To Eat An Onion That's Slightly Brown Inside? - Tasting Table

It's similar to trimming a block of cheese or eating around the brown spots of an apple. If most of the onion is fresh with only a few dark lines, you should be able to salvage the good stuff. However, mold is a different story. On the interior, if you notice thin white pores, it's a key indicator that mold is growing and the onion is no longer safe to eat (via EatingWell).

It's a bumpy ride from the farm to the grocery store, and bruising is a key factor in these unpleasant spots. Like apples, when you drop an onion, it turns soft. According to The Chronicle Express, a fungus called Aspergillus niger grows on damaged and bruised fruits. Once the exterior paper of onions starts to form black spots that resemble dirt, it's a sign that mold has taken over and it's time to toss. Don't be fooled — many people assume it's soil from the farm and the onions are really that fresh, but blue marks embedded in the paper are an ultimate red flag (per Mashed).

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Is It Dangerous To Eat An Onion That's Slightly Brown Inside? - Tasting Table
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