The reason potatoes explode in the microwave is because of the high water content in them. When you heat the potato up, the water turns to steam. Think of the potatoes' skin as some kind of pressure vessel. As the steam builds up, it causes the pressure inside to increase.
Why is my potato popping in the microwave?
When a potato is cooked in the microwave, the internal water boils and produces steam. Since potatoes have an outer skin, the steam builds up, creating pressure. Eventually, the built up pressure bursts the potato.
Why you shouldn't microwave potatoes?
Potatoes often house Clostridium botulinum, the botulism bacteria. When potatoes are cooked and not immediately stored in the fridge, spores of the bacteria can multiply. Microwaving the potatoes won't kill the bacteria either, so your second-day potatoes could cause an upset stomach.
How do you keep baked potatoes from exploding?
You don't dry the potato well. But you need to dry the spuds well after the bath. Excess moisture on the skin can seep into the potato during baking and cause soggy skins. Do be sure to prick a few holes into the skin, too. While the potato is unlikely to explode in the oven, no one is here to take risks with dinner.
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