Initially the mixture appeared very wet and unlikely to form up into balls of dough but leaving to stand for 10 minutes resulted in dough just firm enough to handle easily. (foreverfreefrom.com)
Some research suggests this exists for memories formed up until the age of 7 are generally lost. (sbnation.com)
Run at first speed until the dough forms up on the hook and comes away from the sides of the bowl (8 to 10 minutes). (mycookinggallery.blogspot.ru)