Here’s where it gets weird: heat can’t reverse damage. If your food already had bacteria that produced toxins (like the ones that cause food poisoning), cooking might kill the bacteria, but the toxins can survive. Think of it like a ghost story—the ghost is gone, but the spooky vibes linger.
For example, the bacteria that cause Staphylococcus aureus food poisoning release a toxin that’s heat-stable. You can boil, bake, or fry that food, and the toxin will still be there, ready to ruin your evening. So, if your potato salad has been sitting out for four hours at a sunny picnic, cooking it won’t save you. Toss it. I know, it hurts. But your stomach will thank you.
What About Freezing? Does That Kill Bacteria?
Nope. Freezing is like putting bacteria in a cryogenic nap. They don’t die; they just get really, really cold and enter hibernation. Once you thaw that steak, they wake up, stretch their little bacterial legs, and get back to work. This is why thawing in the fridge is the safest move—it keeps them from multiplying while they defrost.
Does Cooking Kill Harmful Bacteria at William Gainey blog
So, no, you can’t kill bacteria with an ice cube. But you can slow them down like a villain in a slow-motion movie. Hot tip: microwave thawing works faster, but it creates hot spots where bacteria can party. Always cook immediately after microwaving thawed food.
