Imagine holding a paper umbrella in a drizzle. You’d get wet, right? Now imagine holding a plastic-coated umbrella in a firehose blast. That’s parchment paper vs. regular paper.
The silicone is that raincoat. It keeps the heat from soaking into the paper fibers. As long as the temperature stays below that silicone’s “meltdown” point, the paper underneath never gets a chance to combust.
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It’s the same reason you can boil water in a paper cup over a campfire. The water absorbs all the heat, keeping the cup cool. Parchment paper uses the silicone to do the same job.
What Happens When You Push It Too Far?
So, will it ever burn? Absolutely yes. Throw a sheet directly onto a gas flame or crank your oven to self-clean mode (around 900°F), and your parchment will go from zero to crispy in seconds.
It will scorch, turn brown, and eventually smoke. That smoky, acrid smell is your silicone coating breaking down. And honestly? You should never let it get to that point.
A little browning around the edges of your baked goods? Totally normal. Actual flames licking the sides of your pan? That’s your cue to take the cookies out and open a window.
Think of it as a safety feature. It’s telling you, “Hey, I’m doing my job, but I’m right on the edge here. Please respect the broiler.”