"Sourdough taste" refers to the unique tangy flavor that comes from using a type of natural yeast called a sourdough starter in bread or other baked goods. Full definition
Easy way for me to get sourdough tasting bread without all the work (as a working student, I already killed my first starter). (kingarthurflour.com)
The second loaf, which was formed after the first rising and then baked when it had risen, had a less pronounced whole wheat taste with a balanced sourdough taste. (sourdoughhome.com)
I still add yeast (maybe I shouldn't) and it has a nice sourdough taste. (delightfulrepast.com)