Mazurek
mazurka, мазурка
Mazurek is a very sweet, flat cake baked in Poland for Easter. According to Polish gastronomy coursebooks, typical mazurek is a cake that can be made of one or two sheets of short pastry or one sheet of short (or half-short) pastry covered with a sheet of butter sponge cake. The two sheets are fixed together with a help of a layer of marmalade. In case of one-sheet version, marmalade is skipped or goes on top, under the layer of icing. The top of mazurek is covered with a layer of icing (i.e. sugar icing or kajmak) or jelly. It is also decorated with nut-based icing or almond-based icing and candied fruits. Traditionally, home-baked mazurek cakes are often decorated with dried fruits and nuts.
Source: Wikipedia
Recipes

Royal Mazurek Polish Easter Cake | Imperial Sugar
This Royal Mazurek Polish Easter Cake is traditionally served around Easter time. The shortcrust dough is made using boiled egg yolks to create a very fragile, melt-in-your-mouth crust, and filled with a combination of fruit jams, dried fruits, and nuts. ...

Easter recipe: Polish chocolate mazurek | Destination for fitness and wellness
Happy Easter to everyone! Due to this unique and special holiday, I'm coming to you with a great recipe for traditional Polish Easter cake called Mazurek. It's a soft version of shortbread, often topped with almonds and cut into serving-sized squares...