sütten çıkmış ak kaşık, sütten çıkma ak kaşık

[Tureng-Özgür]

as pure as the driven snow

Meaning
Entirely pure.
Origin
Shakespearian, although it doesn't appear in that form in any of his writing. Shakespeare used snow as a symbol for purity and whiteness in several plays. In The Winter's Tale - Autolycus: Lawn as white as driven snow. In Macbeth - Malcolm: black Macbeth will seem as pure as snow.

be as pure as the driven snow
to be morally good. How dare he criticize me for having an affair? He's not exactly as pure as the driven snow himself.

http://idioms.thefreedictionary.com/...he+driven+snow
http://www.phrases.org.uk/meanings/44200.html

[ALI-KARABULUT]

WHITE as driven snow
... as milk
... as a swan
... as a sheet
... as chalk