The term sourdough bread refers to bread made through the leavening process caused by naturally occurring lactobacilli and yeasts. It is the way bread was made to rise for thousands of years. The process of leavening bread (getting it to rise) was independently discovered by different groups of people all over the world at various times. There is no specific origin which can be identified for bread (and all bread was sourdough bread a thousand years ago) but one could guess that the earliest domestication of grains in the Mediterranean region was followed within a few thousand years by bread.
I have checked out two brands of sour dough bread still available. San Louis Sour Dough Bread, I found the sour dough taste to be slightly stronger then Colombo. I actually prefer this San Louis Sour dough ov3er Colombo, so this has soften the blow of losing Colombo Sour Dough Bread. The one bread that came in a close second was Boudini Sour Dough Bread. The sour taste was not as strong as San Louis. Beware of a lot of sour dough imposter's, if it looks like white bread, it is!!!!!!
Yes, sourdough bread has a slightly tangy or sour taste due to the fermentation process that creates natural acids in the dough.
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Neither is great, but of the two, whole wheat would be better. It is a little harder to breakdown into sugar so you will not spike quite as much or as quickly. Actually I've hear quite the contrary. Sourdough bread is sour due to lactic acid released by the bacteria fermenting in the dough. The lactic acid is what keeps the blood sugar from rising.
It is not the bread that is refined but the flour that the bread is made with - thus a sourdough bread can be made with unrefined flour or refined flour.
Mash is the crushed grain and water mixture. Sour is the fermentation agent taken from a previous batch. Not all that different from making sour dough bread.
Sourdough bread is sour because of the presence of lactic acid bacteria in the dough. These bacteria ferment the sugars in the flour, producing lactic acid, which gives the bread its tangy flavor. This fermentation process also helps to break down gluten in the dough, making the bread easier to digest.
Rice bread is gluten-free, but it could be cross-contaminated.
Sour Dough Bread, Regular Bread, Beer, etc.
If it's sour dough made from wheat then yes it does contain gluten. Gluten is found in wheat, barley, and rye. If you have sour dough and it doesn't say "gluten free" than it has gluten in it.
Bread can sometimes smell sour due to the presence of bacteria that produce lactic acid during the fermentation process. This can happen if the bread dough is left to ferment for too long or if it is exposed to certain environmental conditions that promote bacterial growth.
Sourdough bread is sour because of the presence of lactic acid bacteria in the dough. These bacteria produce lactic acid as they ferment the sugars in the flour. This lactic acid gives sourdough bread its unique tangy flavor.