Imagine yourself in the kitchen, peeling an onion, only to find out that it is covered with patches of powdery black dust? This is a very common kitchen dilemma: Is it harmless? Or a dangerous mold or something else in between. And the most important question is: Is the onion safe to eat?
Why Do Onions Develop Black Spots?
The reason behind this black powder on onions is due to a fungus called Aspergillus Niger. Also known as black mold, it is a spore forming fungus that goes naturally in soil and thrives in warm, humid conditions. This mold can get its hold on the onion during the harvesting, transporting or during its storage. It settles on the outer layer of the onion bulb.
Is The Black Fungus Dangerous?
The severity of Aspergillus Niger, depends from person to person. For healthy beings, a small of this fungus is harmless, and unlikely to cause any kind of illness. But for someone who suffers from respiratory issues like asthma, or has a weakened immune system, this mold can trigger allergic reactions or cause respiratory issues. If left unchecked, fungal growth can compromise on both taste and texture.
Are Onions With Black Spots Safe To Eat?
You do not need to automatically throw away Onions with Black Spots. Its edibility depends entirely on how far the mold has penetrated into the onion bulb.
Condition Of The Onion |
Recommended Action
Black spots on dry paper skin, inner flesh is crisp and clear
Safe To Eat: Peel off the affected outer layer, wash the bulb under running cold water and cook normally.
Black specks penetrate deep into the onion bulb flesh, making it mushy, slimy and soft
Discard Immediately: This soft onion is unsafe to eat, as the fungus has penetrated deep inside the bulb.
A foul odour comes from the onion
Discard Immediately: Foul Smell indicates bacterial growth and internal decay.
How To Prevent Black Spots?
Store Properly: Keep clean, whole onions in cool, dark and ventilated space.
Avoid Plastic: Do not store onions in the polythene bags that they come in with from the local market. Moisture trapped in it accelerates fungal growth.
Keep It Separate From Potatoes: Store onions away from potatoes, as they release moisture that can speed up the decay.
Conclusion
While black molds (Aspergillus Niger) is common in onions, it is advised to store it in a proper manner. If your onion shows signs of decay, throw it out immediately. It is important to prioritise food safety.
(Image Credits: Pinterest)
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