One of the latest creations on Pinterest or other social media sites is baking mini pies in Mason jar lids and rings. Is it safe to bake in these lids?
According to Jarden Home Brands, makers of Ball® and Kerr home canning products:
“Our lids and bands are only approved for water contact, since they are heated in water or exposed to water during the canning process. Baked goods usually require oil or fats, which the lids are not designed for. The lids and bands are also tin-plated. Temperatures around 450F can cause tin reflow or hotspots.”
Canning jars should not be used to bake foods in the oven. The glass is not tempered for dry heat and can possibly break.
