Complex sentence: Some varieties of the cake mantained the shape of the spit cake, while the rings are baked separatelly and attached to each other with icing, others like spettekaka and Šakotis have an irregular shape.
Split into simpler sentences: Some varieties of the cake mantained the shape of the spit cake, while the rings are baked separatelly and attached to each other with icing. Others, like spettekaka and Šakotis have an irregular shape.