360 Cookware Stainless Steel Large Cookie Sheet, 17.5 x 14.22 in

1. Cooking surface 40% of the rating 4 of 5

   Uncoated 304 stainless on the food side and the outside, around an aluminum core that 360 says food never touches. Its care guide mentions exposed aluminum in the construction. Stainless holds nickel (8% in the tested sheet) and chromium that can come out in early use, so it stops short of 5.

2. Independent testing 20% of the rating 3 of 5

   Lead Safe Mama published XRF readings for this cookie sheet (January 2026): lead, cadmium, mercury and arsenic not detected on the steel surface. 360 sponsors that site and sent the sheets, so the test is not independent.

3. Durability 20% of the rating 4 of 5

   A lifetime warranty against defects, with its terms published, and 90-day returns; cleaners with surfactants, hydroxides or abrasives void it. Thick tri-ply designed to resist warping, oven safe to 500°F.

4. Trust 10% of the rating 3 of 5

   Names its steel grade and publishes its warranty and origin story. No Prop 65 notice or CPSC recall found. It calls the steel surgical grade and 100% non-toxic, and dropped its plain Made in USA label after moving to Korean-made bonded metal, yet the product page still says Made in America.

5. Value 10% of the rating 2 of 5

   $149.95 for one sheet, against about $23 for a set of three tested stainless sheets from Wildone. The extra buys US forming, a lifetime warranty and thicker multi-ply metal.

The rating, 3.5 of 5, is the weighted average of these scores. See how we rank cookware and our standard.

1. 304 stainless steel (the maker calls it surgical grade) on the food side and the outside, around an aluminum core, per a maker answer in the product page Q&A
2. No coating of any kind, per the maker

• Paid certification Lead Safe Mama (XRF screening by Tamara Rubin; 360 Cookware sponsored the site's newsletters in November and December 2025, sent the sheets for this test and gives the site's readers a 20% discount code) January 2026

  January 2026 XRF readings for a 360 large cookie sheet (304 stainless steel: chromium 18%, nickel 8%, iron 72%, manganese 1.2%) and a 360 medium cookie sheet (316 stainless steel: chromium 17%, nickel 10%, molybdenum 2%): lead, cadmium, mercury, arsenic, antimony and bromine were not detected in either. Each reading ran 60 seconds and was repeated. XRF reads the surface, so it says nothing about the aluminum core. This is not an independent test: 360 sponsors the tester, sent these sheets at her request and gives her readers a discount code, which is why we label it paid. The author notes the sheets are not nickel-free, and says her earlier 2025 tests of 360 pans, on samples the maker also sent, found the stainless food-contact parts non-detect for the same metals. Open ↗ (opens in a new tab)

Who pays the tester?

The one outside test of this sheet is not independent. Lead Safe Mama says it invited 360 Cookware to sponsor the site in October 2025, after its first round of tests, and 360's banner ran in its newsletters in November and December 2025, helping cover newsletter costs and some testing and reporting costs (January 2026 post (opens in a new tab)). 360 sent the sheets at the author's request and gives her readers a 20% code. She says the links are not affiliate links, and describes the owners as friends. We label the test as paid. Mamavation's baking sheet guide (opens in a new tab) also lists 360 among its best and has offered a 15% code. Our page takes no payment.

Is it really made in the USA?

The product page says Made in America and handcrafted in the U.S.A., and the site banner says made in the USA with global materials. The maker's origin page (opens in a new tab) says it dropped the plain Made in USA label because the bonded stainless and aluminum metal for its pans has come from South Korea since 2019, and that over 85% of production and components are American. That page describes a saucepan, so we could not learn where this sheet's metal is made. The product page's Made in America wording is the kind of plain claim the origin page says it removed.

Is surgical grade stainless steel 100% non-toxic?

Surgical grade is a marketing term, not a standard. 360 calls its 304 steel surgical grade and says no unwanted substances will leach into food. Stainless steel does release small amounts of nickel and chromium, mostly from new pans and with acidic food (safer cookware guide). Lead Safe Mama notes the sheets are not nickel-free, so they are not for a nickel allergy.

Is there aluminum in a multi-ply sheet?

Yes, in the middle. A maker answer in the product page Q&A says the large sheet has T-304 stainless on the food side and the outside around an aluminum core, and that food does not touch the core. The page also promises no exposed aluminum touching your food, but the care guide warns that harsh dishwasher detergent can damage exposed aluminum within the bakeware's construction, which suggests the core may show at the edges. The page does not say. Lead Safe Mama's XRF reads the steel surface, not the core. See our article on aluminum.

Has 360 sold anything that failed a test?

One item. In the same 2025 round, Lead Safe Mama tested a pewter measuring spoon that 360 resold for another maker, and it tested positive for lead. The author says 360 took it off its site and would sell no more pewter (November 2025 post (opens in a new tab)). No pewter or measuring spoons appear in 360's product catalog today (checked 2026-11-03). The sheets read non-detect.

Can it go in the dishwasher?

The warranty (opens in a new tab) says cleaners with surfactants, hydroxides or abrasives will void it, which includes many dishwasher detergents. Plan to hand wash.

• Uncoated 304 stainless steel, per the maker's spec, and Lead Safe Mama's published readings found no lead, cadmium, mercury or arsenic in the tested sheets.
• Oven safe to 500°F, per the product page. The budget stainless set we list is rated to 450°F.
• A lifetime warranty with its terms published, formed in Wisconsin.
• It avoids the nonstick coatings, silicone coats and bare aluminum that many baking sheets use.

• $149.95 for one sheet. Wildone's set of three tested stainless sheets costs under $25. 360 also lists a factory-seconds large sheet at $89.95 on its own site; we did not check its terms.
• The only outside test comes from a site 360 sponsors, using sheets 360 sent.
• Stainless steel contains nickel, and the sheet has an aluminum core between the steel layers. 360 says food never touches it, but its care guide mentions exposed aluminum.
• Hand wash. Some dishwasher detergents void the warranty.
• We found it only on 360's own site, not on Amazon, Walmart or Target.

1. 360 Cookware Large Cookie Sheet product page. Maker’s page. Read 2026-11-03: $149.95, 304 surgical grade stainless steel, oven safe to 500°F, lifetime warranty, 90-day returns. A Q&A answer names the aluminum core. Open ↗ (opens in a new tab)
2. 360 Cookware: Where 360 Cookware is made. Maker’s page. Says over 85% of production and components are American and that bonded metal has come from South Korea since 2019. Open ↗ (opens in a new tab)
3. 360 Cookware: Lifetime warranty. Maker’s page. Open ↗ (opens in a new tab)
4. Lead Safe Mama: XRF test results for a 360 Cookware large cookie sheet (January 2026). Test report. Full XRF readings, with the sponsorship, the discount code and the nickel note stated by the author. Open ↗ (opens in a new tab)
5. Lead Safe Mama: XRF test results for a 360 Cookware medium cookie sheet (January 2026). Test report. Open ↗ (opens in a new tab)
6. Lead Safe Mama: XRF test results for 360 Cookware's 1 quart saucepan (November 2025). Test report. The first round of tests, on samples 360 sent in 2025. The post, dated 16 November 2025, announces 360's sponsorship and the pewter spoon that tested positive for lead. Open ↗ (opens in a new tab)
7. Mamavation: Safest non-toxic baking sheets, cookie sheets and sheet pans (June 2023). Test report. A materials review with no lab test; lists 360 bakeware among its best. The site earns affiliate income and offers a 360 discount code. Open ↗ (opens in a new tab)
8. California Attorney General: Prop 65 60-day notice search. Certifier or regulator listing. Searched by alleged violator on 2026-11-03 for 360 Cookware, Americraft and Liberty Tabletop; none named. Open ↗ (opens in a new tab)
9. CPSC recalls API. Certifier or regulator listing. Searched on 2026-11-03 under 360 Cookware, Americraft and Liberty Tabletop; no results. Open ↗ (opens in a new tab)

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