While these molds are primarily for ice they can also be used for candy making, sugar, mousse and ice cream. I reached out to the seller/manufacturer and confirmed that these molds we're safe to be in the oven at 180 degrees Celsius which equals roughly 356 degrees Fahrenheit. However, because some peoples ovens can run hot, etc. I decided it was better for me to add in a step of having the mozzarella softened in a baking pan then added to the mold.