Baking Sheets vs Cookie Sheets: What’s the Difference?

Reach for the flat pan and the butter runs off the edge onto the oven floor; grab the rimmed one and your cookies steam instead of browning crisp. The two pans are not interchangeable, even though stores shelve them side by side and some labels treat the names as synonyms. Edge style decides which one you want, and the rest is size and material.

What Actually Separates The Two Pans?

The difference comes down to the rim. A cookie sheet has one, two, or no raised edges, and many models add a small handling lip on one side so you can slide it in and out safely. A baking sheet, or sheet pan, has raised edges on all four sides — a full sheet pan’s rims run about an inch tall.

That choice changes what each pan does well. Raised rims contain fat, juices, batter, and sauces so nothing drips onto the oven floor. Flat sheets let you slide a whole batch of cookies off in one motion and give air more room to move around each piece.

Airflow matters more than most bakers realize. Flat and low-sided sheets promote better circulation around cookies, which is the reason cited over and over for even browning and crisp edges. Put the same dough on a high-rimmed pan and the walls block some of that moving air, so the edges set slower and the cookies brown less evenly.

Terminology is the messy part. Southern Living notes that cookie sheets and baking pans are not actually the same thing, even though some sources blur the terms. In U.S. kitchens, “sheet pan” almost always means a rimmed baking sheet, while “cookie sheet” implies the flatter pan.

Which Pan For Which Food?

Match the pan to whether the food releases liquid. Cookies, biscuits, crackers, and thin pastries belong on a cookie sheet. Roasted vegetables, meats, sheet cakes, and anything that can leak or drip belong on a rimmed baking sheet.

• Cookie sheet: drop cookies, sliced cookies, biscuits, crackers, thin pastries — items that hold their shape and give off little or no liquid.
• Rimmed baking sheet: roasted vegetables, chicken and other meats, sheet cakes, casseroles, and anything with a sauce or glaze.
• Never on a flat sheet: batter, high-moisture vegetables, and fatty meats. The drips land on the oven floor and burn.

KaTom’s buying guide frames it the same way: rimmed pans handle the messy jobs, and flat pans exist to make baked goods easy to remove. If you only own one pan, the rimmed baking sheet is the better single buy because it covers more ground — but a rimless sheet will bake a better batch of cookies.

See our tested picks for cookie baking sheets if you want to skip the guesswork on which flat pan actually performs.

What Sizes And Materials Should You Look For?

Size decides whether the pan fits your oven and whether two pans run side by side. A full sheet pan measures 18×26 inches, a half sheet pan is 18×13 inches, and a medium baking sheet runs 10×15 inches. Standard sheet-pan sizes also include 13×18 inches and 13×9 inches, per KaTom.

Watch the jelly roll pan in particular. It is rimmed, usually around 10 1/2×15 1/2 inches with some listed at 12×18 inches, and it exists for liquid-containing bakes like thin cakes and bar cookies. Treating it as a cookie sheet is a common mix-up, since the rims change how cookies brown.

Cookie sheets are commonly aluminum or stainless steel. Thicker sheets resist warping better; thinner sheets heat faster but tend to flex. Some use a corrugated surface to improve airflow, though that is a product feature, not an industry standard.

TODAY’s baking sheet coverage makes the practical point: a rimmed pan’s sides give it range beyond baking. Buy by edge style, dimensions, and intended use rather than by the name printed on the label — the least reliable thing in the aisle.

FAQs

Can I use a rimmed pan to bake cookies?

Yes, and it works in a pinch. The rims reduce airflow around the cookies, so browning tends to be a little less even and the edges set more slowly. Rotate the pan halfway through baking and expect decent results rather than ideal ones.

Is a jelly roll pan the same as a cookie sheet?

No. A jelly roll pan has rims on all four sides and typically measures around 10 1/2×15 1/2 inches. It is built for thin cakes and bar cookies that hold liquid batter. A cookie sheet is flat or nearly flat, which is what lets you slide baked goods straight off.

Why do my cookies burn on the bottom?

Pan choice and edge style both play a role. A dark pan absorbs more heat, and a high rim blocks airflow so the bottom overbrowns before the center sets. A light-colored flat or low-rimmed sheet gives you more even browning and a wider margin for error.