Can the Sanneng cookie mold be put into the oven?

It depends on the material of the biscuit mould. If I remember correctly, Sanneng's cookie molds should all be made of silver and aluminum, and they should be able to be put. Plastic ones are definitely not good.

But why did you put the cookie mold in the oven? Shouldn't you carve the required pattern on the dough with a mold first, and then put the biscuit dough in the baking tray and put it in the oven?