"A distinctly American invention" - really? Sourdough as a technique was known and documented in the Old World a few millennia before the founding of modern America - search Google Books for "Handbook on Sourdough Biotechnology" Reply
"A distinctly American invention" - really? Sourdough as a technique was known and documented in the Old World a few millennia before the founding of modern America - search Google Books for "Handbook on Sourdough Biotechnology"