Kolach is the Slavonic term for a number of traditional baked products, such as:
Kolach (bread), a circular bread, most often made as a sweet dish Slavski kolač, a Serbian variant of the kolach, made for the celebration of Slava Kolach (cake), a Czech and Slovak sweet pastry different from the above Klobasnek, a savory bread known as kolache in Texas
See also
Korovai Kolatch, people with this surname