For a popcorn kernel to pop, its internal temperature needs to hit around 356 degrees Fahrenheit (that’s about 180°C). Think of it as the kernel’s personal boiling point—but for pressure, not water.
Why that specific number? It’s the point where the small amount of water trapped inside the kernel turns into steam, creating a massive internal pressure. Imagine a tiny pressure cooker with no release valve—something’s gotta give.
The Science of the Snap (It’s Cooler Than You Think)
Inside every kernel is a little droplet of water surrounded by a hard, starchy shell. As the temperature rises, that water turns to steam, and the pressure builds to over 135 pounds per square inch.
That’s about the same pressure as a car tire, but all jammed into a speck of corn! When the shell can’t hold it anymore, it ruptures with a pop, and the starchy innards explode outward, cooling and puffing into that familiar shape.
So you’re not just microwaving a snack; you’re creating a controlled explosion in your kitchen. Pretty rad, right?
