Kefir biscuits (qatiqli pechenye)

Instructions

1. Preheat the oven to 175 °C (350 °F) and line a baking sheet with parchment paper.
2. Cream the soft butter with the sugar until light and fluffy.
3. Add the egg and mix, then pour in the kefir while whisking.
4. Combine the flour, baking soda, baking powder, salt and vanilla, then fold them into the wet mixture without overworking the dough.
5. Shape small balls and place them on the sheet, spaced apart.
6. Bake for 12 to 15 minutes, until the bottoms are golden.
7. Let them cool slightly, then dust with icing sugar if you like.