By hand: blend the butter into the dry mixture by rubbing between your fingertips, quickly and lightly (you want the butter to stay cold and unsoftened).
(you; want; the butter to stay cold and unsoftened) Context(you want,List([104, 112))):(the butter; to stay; cold and unsoftened)
you want,List([104, 112))
you the butter
want to stay
the butter to stay cold and unsoftened
cold and unsoftened