Sourdough breads are made that has a sourdough starter. The starter cultivates yeast and lactobacilli in a combination of flour and h2o, using the microorganisms presently current on flour; it doesn't need to have any additional yeast. Soda bread has a definite crusty exterior plus a dense, somewhat crumbly interior. https://food-learning-center37147.getblogs.net/64594601/the-2-minute-rule-for-food-learning-center