Sour Milk and Soda Buns

Proziaki are Carpathian soda buns that taste a lot like American-style drop biscuits (dare I say Bisquik?) but look just like English muffins. The name proziaki comes from the regional word for baking soda. These simple-to-make buns have been around since the mid-nineteenth century, when baking soda made its debut in Poland. And since they’re Polish, of course a soured milk product gets snuck into the mix. I use kefir, but if you can’t find it locally, a thick buttermilk or loose sou