Made from the same material as our parchment papers if you care baking cups use premium quality unbleached greaseproof paper the baking cups use no chlorine in their production and that means no chlorine is dumped into our lakes rivers and streams unbleached greaseproof paper totally chlorine free tcf minimum waste unbleached recycled cardboard packaging vegetable based inks for printing non toxic glues cardboard packaging should be recycled excellent for baking no greasing necessary