Proziaki be produced with the addition of sugar. In numerous Subcarpathian villages the proziaki bakes are diversified by adding buttermilk, cottage cheese or more butter. Traditionally, prozianki are served with fresh butter, cottage cheese or marmalade. The consummation of proziaki is frequently followed by sweet milk. Proziaki Proziaki, soda bread - flour-based rolls with added sodium bicarbonate ("proza") originating from Subcarpathia in south-eastern Poland, also common in other parts of the country. Proziaki are produced by the use of wheat flour or wheat-secale flour, eggs, sour smietana (sour cream), water, salt and a maximum of one table spoon of sodium bicarbonate,
Buttermilk cultured buttermilk to simulate residual flecks of butter that can be left over from the churning process of traditional buttermilk. Cultured buttermilk, often known simply as "buttermilk" now, was first commercially introduced in the United States in the 1920s. It was popular among immigrants, and viewed as a food that could slow aging. It reached peak annual sales of in 1960. Buttermilk's popularity has declined since then, despite an increasing population, and annual sales in 2012 reached less than half that number. Condensed buttermilk and dried buttermilk have increased in importance in the food industry. Buttermilk solids are used in