Mix flour, butter, salt, soda and grind into crumbs. Break the butter into pieces beforehand.
Add kefir and knead the dough. Sprinkle the table with flour and roll out the dough to a thickness of 0.5 cm.
Grease the dough with butter and sprinkle with sugar and cinnamon.
Roll up the roll, cut into small pieces 2 cm thick. Place them on parchment paper and put in the oven preheated to 200 °C for 20 minutes.