A bare metal sheet pan is a recipe for scrubbing baked-on mess for twenty minutes, so we use liners. Then you open the drawer and there are three options and no obvious rule.
I bought my first silicone baking mat thinking it would replace parchment paper forever. It did not. Then I went back to parchment for everything, which felt wasteful. They both have specific jobs, and most of what gets repeated online about them is somebody’s brand spec quoted as if it were physics.
The case for parchment paper
Parchment paper is, in Reynolds’ own words, “paper with a food-safe silicone coating that makes it heat-resistant and non-stick.” It’s thin, disposable, and it releases almost anything.
Parchment is the workhorse of baking. Cookies, cakes, brownies. Line the bottom of a cake tin with it and the cake pops out instead of leaving half itself behind. Being thin matters too: a sheet of paper doesn’t sit between your food and the hot pan the way a thick mat does.
For messy savory roasting, parchment is brilliant. Sticky sweet potatoes, a glazed piece of salmon, whatever. It’s exactly why the paper goes down first for this sheet pan ginger tofu and broccoli with sticky glaze. When dinner’s done, you throw the paper away and rinse the pan.
The downside is that it’s a consumable, and it has a real ceiling. Reynolds rates its parchment rolls to 425 degrees Fahrenheit and is blunt about the rest: “Never touch the parchment paper to an open flame or to the sides of the oven, and do not use with a broiling unit or toaster oven.”
The case for silicone baking mats
Silicone mats are reusable, flexible, and built around a reinforcing core. Nordic Ware describes its Deluxe Silicone Baking Mat as “food-grade silicone with an encapsulated fiber core,” and backs it with a five-year warranty. Treated well, a mat outlives a lot of your other gear.
Mats are the right call for anything sticky. Candy, caramel, brittle, macarons. Nothing grabs onto them.
They’re also great for kneading dough or rolling pie crust on the counter, then rinsing the whole thing in the sink.
Now the part everybody gets backwards. The internet insists cookies spread more on silicone. King Arthur Baking ran the same dough on five surfaces, and the silicone mat gave the least spread of the lot, producing cookies that were “thick and chewy” and perfectly round. Foil gave the most, so flat that they “looked like a different cookie recipe altogether.” Parchment landed in the middle, spreading “just enough while maintaining a nicely domed center.” That’s one dough on one day, not a law of nature, but it’s a real side-by-side test and it points the opposite direction from the folklore. If your cookies are going flat, check your butter and your flour before you blame the mat.
Where I still reach for parchment is crisp bottoms, since a mat is thicker than a sheet of paper. That’s a preference call rather than a rule, because King Arthur’s testers got browned bottoms on the mat too.
For roasting vegetables, silicone is rarely my choice. Vegetables release water as they cook, and frozen ones release even more, which matters if you stock the freezer after reading up on how frozen and fresh vegetables compare on fiber per dollar. That water tends to pool on the mat instead of hitting hot metal, and pooled water means steaming instead of caramelizing.
What the heat ratings actually say
There is no universal number for either liner, which is why “silicone is good to 450” is such a stubborn piece of bad advice. It’s one company’s spec wearing a lab coat. Here’s what manufacturers actually publish:
- Reynolds parchment paper rolls: 425 degrees Fahrenheit, and never under a broiler or in a toaster oven.
- Wilton’s own bakeware guide lists its silicone bakeware as oven safe up to 375 degrees.
- King Arthur’s silicone rolling mat, which doubles as a baking mat, is listed oven-safe to 500 degrees.
- Nordic Ware sells a three-piece cookie baking set where “the full set is oven safe up to 425 F, while the pan itself is designed for use up to 500 F.” The liner is the limiting part, not the metal.
That’s a 125-degree spread between published silicone numbers from two reputable brands. Read the sleeve your mat came in. If it’s long gone and you can’t find a number online for that exact product, don’t push it past a normal 375 to 400 degree bake.
When to use aluminum foil
Foil deserves a mention even though it isn’t really a baking liner. Standard foil is not non-stick, and King Arthur’s test is the proof: cookies baked on foil came out flatter than anything else they tried. Reynolds does sell a separate Non-Stick Foil, and for those foils specifically you “always place your foods toward the dull side.”
While we’re here, kill the shiny-side myth. Reynolds says plainly that “both sides of aluminum foil reflect heat and heat foods at virtually identical rates,” and the difference in appearance “is due to manufacturing, not functionality.”
What foil is genuinely good for is heat that would end a sheet of parchment. Broiling chicken wings, blasting potatoes at 450. Parchment isn’t rated for a broiler and a mat might not be either, so foil takes that job. Just brush a little oil on it first.
Don’t line the oven itself
This is the one nobody mentions, and it’s the only part of this article that can cost you an appliance. GE Appliances is direct about it: “Do not use aluminum foil to line oven bottoms. The foil will trap heat below, and disrupt the performance of the oven.” GE adds that “the same is true for similar items such as silicone oven liners,” that foil “can melt and permanently damage the oven bottom,” and that damage from improper foil use isn’t covered by the warranty.
If you’re trying to catch a drip, GE’s own allowance is to put a sheet on a lower rack several inches below the food, without covering an entire rack and keeping it at least an inch and a half from the oven walls.
Making the choice simple
Use parchment for almost all baking. Cookies, cakes, breads like this high-fiber gluten-free loaf that holds together, and roasting vegetables when you want easy cleanup and browning. Definitely use it for this sheet pan breakfast hash with eggs and sweet potatoes, because nobody wants to scrub baked egg off bare metal. Keep it at or under your brand’s rating, and keep it away from the broiler.
Use a silicone mat for sticky jobs and for cookies you want thick and round. Candy, caramel, macarons, kneading, rolling.
Use foil for broiling and aggressive heat, on the pan and never on the oven floor.
You don’t have to pick a team. A roll of parchment and one silicone mat covers basically everything your oven will throw at you. You just have to know which one to grab, and what temperature your particular liner is actually rated for.
