Ptasie mleczko (Polish: [ˈptaɕɛ ˈmlɛt͡ʂkɔ] ⓘ) or bird's milk is a Central European confectionery originating in Poland.

Other confectionery producers also make similar candies named differently (e.g., Alpejskie mleczko, "Alpine milk").

The brand was introduced in the 1960s during the Soviet era, and continues to be used by companies operating the factories which produced these candies and cakes since that time.

The expression is also found in Strabo's Geographica where the island of Samos is described as a blest country, to which those who praise it do not hesitate to apply the proverb that "it produces even bird's milk" (φέρει καί ὀρνίθων γάλα).

[7][8][9] In one such tale, the beautiful princess tests the ardor and resourcefulness of her suitor by sending him out into the wilderness to find and bring back the one fantastical luxury she does not have: bird's milk.

[11][12] According to the company's official history, Wedel's inspiration for the name of the confectionery came from his voyages to France, when he asked himself: "What could bring greater happiness to a man who already has everything?"

"[13] In Russia, ptichye moloko was originally a type of confectionery introduced in 1967 in Vladivostok and in 1968 by the Rot Front factory in Moscow.

A distinct feature of the Russian recipe is the usage of agar-agar instead of gelatin as a thickening agent, which withstands the high temperature needed to melt down sugar into a syrup.