Exceptional non stick - with 2 layers of Quantum II non stick, the madeleine tin releases cakes easily and cleans in seconds.. Robust - the cake pan is made of 1 mm-thick, warp-resistant carbon steel, which is oven safe to 220C (428F). Loose Bottom - the pop-up base ensures neat results, so it's ideal for baking impressive bottom tiers, or large fruit or sponge cakes. BPA, PTFE and PFOA free - this product is oven safe to 220C, warp resistant, dishwasher safe.