Soda bread published containing a recipe for Soda Cake. In Europe, soda breads began to appear in the mid-19th century when bicarbonate of soda first became available for use as a raising agent. Breads, griddle cakes and scones with bicarbonate of soda, plus cream of tartar or tartaric acid became popular in Austria, Britain, Ireland and Poland. Traditional soda bread, eaten in Serbian cuisine, also uses bicarbonate of soda, particularly the traditional "česnica" (Serbian Cyrillic: Чесница), a soda bread made at Christmas. In Ireland, the flour is typically made from soft wheat, so soda bread is best made with a cake or
Sodium bicarbonate of solution: Commercial quantities of baking soda are also produced by a similar method: soda ash, mined in the form of the ore trona, is dissolved in water and treated with carbon dioxide. Sodium bicarbonate precipitates as a solid from this method: Naturally occurring deposits of nahcolite (NaHCO) are found in the Eocene-age (55.8–33.9 Mya) Green River Formation, Piceance Basin in Colorado. Nahcolite was deposited as beds during periods of high evaporation in the basin. It is commercially mined using common underground mining techniques such as bore, drum, and longwall mining in a fashion very similar to coal mining. Limited