Is it safe to bake muffins in silicone molds every weekend?

What's actually in it

Food-grade silicone is safer than many plastics at cooking temperatures. It isn't fully inert. Cyclic siloxanes (D4, D5, D6) are the base units of silicone rubber, and small amounts migrate out of the material at oven temperatures above 200°C (390°F). The migration is into both the food being baked and the oven air that the cook breathes.

Muffins, cookies, and cakes typically bake at 180-220°C. That's right in the range where siloxane release picks up.

What the research says

A 2025 study in J Hazard Mater measured silicone bakeware as a source of human exposure to cyclic siloxanes via inhalation and baked food consumption. Both routes had measurable exposure. Daily-use bakers could accumulate meaningful doses. Siloxanes are endocrine disruptors and have been linked to reproductive effects in animals.

For most home bakers, occasional silicone use is fine. For daily or weekend baking, metal pans with parchment paper (unbleached, ideally chlorine-free) are cleaner. A glass pie plate and enamel-coated cast iron are other good alternatives. If silicone is the preferred option for flexibility, buy platinum-cured food-grade silicone from reputable brands and avoid cheap silicone imports that might release more.