It is too! Galette des rois is what we traditionally eat during epiphany. It is most often a puff pastry with almond-flavoured custard (frangipane), but there are other kinds too. More generally, galette is a generic word for a round and flat object.
For those interested, Garnier is a brand of L’Oréal. Nestlé does own about 20% of L’Oréal shares, but is not directly involved in Garnier. I’m sorry but I’m sceptical you’ll be able to find some mass-produced product not made by a company at least partially owned by assholes…