The Polish Easter cake that is a thin, rich pastry decorated with icing, nuts or dried fruit is called mazurek.
Mazurek is traditionally served in Poland during Easter. It usually has a low pastry base topped with a dense layer such as chocolate, caramel, fruit preserve, nut paste or dried fruit. Its surface is often elaborately decorated with nuts, almonds, candied fruit, icing and short Easter messages.
Recipes differ widely between households and regions, so mazurek is better understood as a family of decorated Easter cakes than as one fixed formula. The cake is commonly made in a rectangular or square shape, although round versions also occur.
Mazurek should not be confused with babka, another Polish Easter cake that is generally tall and yeast-raised or sponge-like. The low profile and decorative topping are the most recognizable features of mazurek.