Thankfully, you’re still safe to nuke a raw spud for a quick and easy side dish. The danger comes when you try reheating cooked potatoes. Cooking potatoes in aluminium foil protects the bacteria C. botulinum from the heat, meaning it can still thrive if the potato stays at room temperature too long, and potentially cause botulism. Popping that contaminated tatie in the microwave won’t kill the bacteria, either, so play it safe by cooking them on a baking sheet instead of wrapped in foil and refrigerating leftover potatoes as soon as possible. Did you know Queen Elizabeth II refuses to eat potatoes, microwaved or otherwise? Find out what other foods the Queen will never eat here.