An heirloom enameled cast iron pot with a fused-glass cooking surface — no PTFE, no PFOA and no synthetic non-stick layer to scratch or degrade.

High-fired Burgundy clay pie dish made in France, with a hard glaze and no non-stick coating. Emile Henry states its glazes are lead-free and cadmium-free and meet California Proposition 65.
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PFAS in bakeware comes from non-stick coatings. This dish has none: it is clay, fired hard, with a glass glaze fused onto it. The only chemistry question a glazed ceramic raises is the glaze itself, and Emile Henry states its glazes are free of lead and cadmium and meet California Proposition 65.
What this dish is made of: fired clay and a fused glaze. No PTFE, no PFOA, nothing sprayed on.
Avoid non-stick coated bakeware for pies, which is where a coating buys you nothing: pastry releases from glazed ceramic perfectly well, and a fluoropolymer layer in a 425-degree oven is the exposure a pie dish never needed to add. Also avoid unbranded imported glazed ceramic with no stated lead and cadmium testing — glaze is exactly where that matters.
Straight answer: we're a research team, not a testing lab. Here's exactly what our rating is based on — and what it isn't — so you can weigh it honestly.
Anything that adds a known microplastic, PFAS, or off-gassing source — a non-stick coating, a plastic surface against food or skin, vinyl/PVC — is downgraded or cut. We only list what clears that bar.
An heirloom enameled cast iron pot with a fused-glass cooking surface — no PTFE, no PFOA and no synthetic non-stick layer to scratch or degrade.
A porcelain-enamel-over-cast-iron pot that braises, bakes and simmers with zero nonstick coating or plastic.
Borosilicate glass is chemically inert — no microplastics leach into food, even when heated in the microwave or dishwasher.
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