Kučanski koščičjak is a traditional dish hailing from the villages of Kučan and Zbelava. The dish is made from buckwheat flour, grains, pumpkin seeds, and Varaždin pumpkin oil, shaped into a gibanica which is not rolled, but layered. The dough is made from buckwheat flour, plain flour, oil, salt, warm milk, and water, while the stuffing is a combination of buckwheat mash, ground pumpkin seeds, and fried onions.

Before baking, this pie is cut on top and the upper part is soaked with pumpkin oil. Kučanski koščičjak is traditionally prepared and eaten on Christmas Eve.