Le phrase mon parfum préféré

Bonjour Fran, 

Yes, you can use both 'saveur' and 'parfum' when talking about ice cream in French, though they have slightly different nuances:

Saveur refers more to the taste or flavour that you experience when eating the ice cream. It emphasizes the gustatory sensation.

Parfum refers more to the scent or aromatic quality, and by extension, the variety or type of ice cream. It's commonly used in French to describe ice cream flavours, especially when ordering or discussing different varieties.

Bonne Continuation !