It is made of two layers of puff pastry, filled with whipped cream[1], crème pâtissière[2] (according to Polish gastronomy textbooks made from whole eggs[1]; some versions consist of melted butter[3][4]) or just thick milk kissel enriched with melted butter[5],[note 1] or sometimes filled with egg white cream[1].

[6] The cake itself is a variation of mille-feuille[7][8] – a French dessert made of three layers of puff pastry filled with cream or jam – also known as the Napoleon.

[11][10] On 16 June 1999 pope John Paul II mentioned that after he had completed his matura exam, he had kremówkas with his colleagues in his home town of Wadowice.

[9][11][10] The confectionery shop where the Pope ate kremówkas was owned by Jewish cake maker Karol Hagenhuber, who came to Poland from Vienna.

[10] According to him his father's cakes were regular, non-alcoholic kremówkas, although made with all natural ingredients, using a traditional recipe.