"هٰذا حَليب بارِد."

Translation: This is cold milk.

[staeppvargen]

How would you put it for "this milk is cold?"

[M_Alrehaily]

هذا الحَليبُ بارد.

[ShruthySha]

Why not translate it to this milk is cold?

[suzwzaidel]

the answer should be 'this is a cold milk'

[vsandl]

You can't have "a milk". It's a non-count noun.