Which should you choose?

My buying recommendation: start with parchment for varied baking projects, then add a silicone mat if you regularly bake on the same sheet pan. There is no need to replace one with the other completely. Think about your most frequent task, how much washing you want to do, and whether a dedicated liner fits your routine.

The distinction is not simply paper versus silicone. King Arthur’s Half-Sheet Baking Parchment Paper has a light silicone coating, while OXO’s Silicone Baking Mat uses silicone and fiberglass construction. Both are intended as nonstick liners, but they are different products with different care requirements. (shop.kingarthurbaking.com)

Task-by-task comparison

  • Everyday cookies: Either is a reasonable starting point. In King Arthur’s comparison using one chewy chocolate chip cookie recipe, parchment produced generally round, evenly thick cookies; its silicone cookie mat produced somewhat more uniform, thick, chewy results. That supports trying both—not declaring a universal winner. (kingarthurbaking.com)
  • Repeated baking on one pan: A reusable mat is worth considering if washing a liner suits your routine. OXO describes its mat as reusable and dishwasher-safe. This is a product-specific feature, rather than a care rule for every silicone mat. (oxo.com)
  • Rolling and shaping dough: Parchment can serve as a preparation surface, according to King Arthur. A dedicated rolling mat offers another approach: King Arthur’s model has concentric sizing circles and is designed to stay in place on the counter. (shop.kingarthurbaking.com)
  • Roasting: Both reviewed brands describe roasting uses for their respective liners. That establishes intended use, not equal browning performance; these sources do not provide a controlled parchment-versus-mat roasting comparison. (shop.kingarthurbaking.com)
  • Pie-crust sizing: A marked rolling mat is the more purposeful option if measuring dough is your main frustration. King Arthur specifically describes its circular guides as an aid to rolling the desired size. (shop.kingarthurbaking.com)

King Arthur’s side-by-side comparison kept the recipe, baking time, and oven-rack position consistent. Its silicone mat produced cookies with browned bottoms and edges and easy release. Parchment also performed well, although some cookies spread slightly more. (kingarthurbaking.com)

The useful conclusion is that a liner can influence the result. The limited conclusion is equally important: one recipe and one mat do not establish how every dough behaves on every silicone product. Claims that silicone always prevents browning—or that parchment always makes better cookies—go beyond this comparison. (kingarthurbaking.com)

If you already like your cookies, I would not buy a new liner solely to chase a theoretical improvement. If you want to compare, make the liner the variable rather than changing several pieces of equipment at once.

Fit and cleanup deserve attention

Compare actual dimensions before choosing. OXO lists its mat as 11.5 by 16.5 inches, while King Arthur’s parchment sheets measure 12.25 by 16.5 inches. Both are marketed for half-sheet-pan use, yet their dimensions differ. Checking the usable interior of your own pan is a sensible shopping step. (oxo.com)

Parchment is not necessarily a one-bake product: King Arthur describes its heavy-duty sheets as reusable. OXO likewise identifies its mat as reusable and dishwasher-safe. Neither description establishes a universal number of uses or proves which option has the smaller overall environmental footprint. (shop.kingarthurbaking.com)

Temperature and heat-source limits

The available instructions are incomplete for a full heat-source comparison. King Arthur publishes product-specific oven limits for its parchment and rolling mat, but the reviewed descriptions do not establish a complete set of broiler, direct-heat, and appliance restrictions. OXO’s accessible mat description supplies construction and cleaning information without that complete guidance. (shop.kingarthurbaking.com)

For temperature limits and heat-source restrictions, refer to the exact product’s packaging or manual and your appliance manual. This guide does not substitute a category-wide limit for those instructions.

A practical buying decision

Choose around the inconvenience you want to solve. For fewer liner-washing chores, I would start with parchment. For a repeatable sheet-pan setup, I would consider a fitted reusable mat. For dough preparation, I would prioritize a dedicated rolling surface with useful markings. You can build a helpful baking kit without buying every kind of liner.