Sourdough. Freshly baked from our original sourdough starter. Available in XL loaf, loaf, bread bowl and roll. (Nutritional values below are based on serving size of 2oz.Click to see full answer. Also to know is, does Panera have real sourdough bread?Sourdough. Freshly baked from our original sourdough starter. Available in XL loaf, loaf, bread bowl and roll. (Nutritional values below are based on serving size of 2oz.Also Know, is Panera Sourdough Bread healthy? This whole-grain side is a decent 180 calories and comes with 4 grams of fiber and 7 grams of protein, a better option than the French baguette. But the sourdough bread bowls are just scary: a staggering 660 calories, with 1,340 milligrams of sodium. Also good news: They’re low in sodium and fat. Subsequently, one may also ask, what are the ingredients in Panera sourdough bread? Panera Sourdough Bread Ingredients Unbleached Enriched Wheat Flour (Flour, Malted Barley Flour, Niacin, Reduced Iron, Thiamine Mononitrate, Riboflavin, Folic Acid), Water, Salt, Yeast (Yeast, Sorbitan Monostearate, Ascorbic Acid), Dough Conditioner (Ascorbic Acid, Microcrystalline Cellulose, Corn Starch).How can you tell if sourdough bread is real?real sourdough is generally cooked darker and has a cream-beige inside, as well as a chewier texture and larger open crumb. its generally very heavy bread while the bakery ‘sourdough’ was quite light. I’m sure it’s possible to cheat, but if the bread is coming from a professional bakery there’s no need.