"Mam wszystkie ciasteczka."

Translation: I have all the cookies.

[Nngpi]

If only!

[SkinnyAf]

Ciasteczkowy potwór.

[SteveLamb2]

I think the word of is missing - i have all of the cookies

[warfreak2]

No, "I have all the cookies" is also correct in English.

[JerryMcCarthy99]

In fact, the additional "of" is fine, and it is accepted.

[Jack.Elliot]

.

[AnastasiaStyIes]

Not sure why your comment got downvotes rather than an explanation, but is this what you had in mind? It's a good thing to know about:

https://pl.wikipedia.org/wiki/Herbatniki#Brytyjski_biscuit_i_ameryka.C5.84ski_cookie

Edit: Now I see your comment has been edited down to nothing, presumably by a moderator if not by you, and we have both received downvotes. I guess someone had their cookies taken.

[wiktorka234]

Jeżeli miałam te ciasteczka......

[Maria652345]

Is “I have every cookie” not correct?

[Jellei]

In a way... it's different grammatically ("Mam każde ciasteczko"), but I guess that "Mam wszystkie ciasteczka" would be the most natural translation. OK, let's add it.