In Italian I've seen a bunch of names for the kneading: pigiare la lana (to tread the wool), fare il pane (to make [knead] bread), and la danza del latte (the milk dance). I think that the first two are references to the movement, just like "making biscuits"; except that bread actually improves as you knead it, unlike biscuits.

As in Portuguese it's just "amassar pãozinho", or roughly "to knead bread", with a [likely affectionate] diminutive.