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Peter’s Blog, “Bread Revolution”

Written By Peter Reinhart
Monday, 20 October 2014 Peter's Blog


Hi Everyone,

On Oct. 21st my new book, two years in the making, will at last be available.  The following is an interview I did with myself in order to give an overview and provide background on the book.  I won’t be selling these directly, but encourage you to support your local book store or, if you prefer, purchase it online.  I’ll be at King Arthur Flour’s Baking School this weekend (Oct. 24-25) for the first official class based on the book.  Also, at Sur la Table South Park (Charlotte) on Nov. 8th for a demonstration class.  Please check with both of these venue to see if places are still available. I’ll post future classes right here, so please check back from time to time. Thanks!


Ten Questions and Answers with Peter Reinhart, author of Bread Revolution: World Class Baking with Sprouted and Whole Grains, Heirloom Flours, and Fresh Techniques (Ten Speed Press, Fall 2014)

What is this book about? A few years ago, I realized there was a growing movement for bread using flour made from sprouted wheat and other sprouted grains. One of the few millers in the country making this kind of flour asked me to test his sprouted whole wheat flour. I was extremely impressed by the flavor. It was better than any 100% whole wheat bread I’d ever made, even those using advanced bakers’ tricks such as preferments and slow cold fermentation. It was smoother (no rough, scratchy taste in the back of the throat), sweeter, and softer than the usual whole wheat breads, yet I made it with only the sprouted flour, salt, yeast, and water. I started playing around with it, along with other types of sprouted flours, such as gluten-free versions and even sprouted bean flours, and felt that this represented a new frontier for bread bakers.

In my explorations, I also learned about other new developments in the world of bread, such as using sprouted grain pulp, regional-specific heirloom flours, and even flour made from dried coffee cherries, grape skins, and grape seeds. Just when I thought the baking community had explored pretty much everything there was to know about bread, I saw that we were actually in the early stages of yet another revolutionary phase. This book explores some of these developments through formulas and profiles of some of its pioneers.

What is the difference between sprouted flour and sprouted pulp?

For the past 50 years, there has been a popular alternative bread on the market made with sprouted grain “pulp” or “mash.” The two most well-known brands are Ezekiel Bread and Alvarado Street Bakery. The grains are soaked, germinated, and then slightly sprouted. It is then ground into a wet pulp in a machine similar to a meat grinder. Other ingredients are added–yeast, salt, sweetener, and pure wheat gluten–and a very tasty bread emerges that is, technically, made without any “flour.” The sprouted pulp requires pure wheat gluten (also called Vital Wheat Gluten) to replace the gluten that is destroyed during germination and grinding. It was assumed that any bread made with sprouted grain would require this additional gluten in order to be light and airy.

When a few millers decided to try drying the sprouts without grinding them, and then milling the dried sprouted grain, it made a very fine flour that tasted different from non-sprouted grain. To everyone’s surprise, the gluten wasn’t destroyed in the sprouted flour and, when reconstituted as a dough, it performed like regular bread but tasted better and contained the health benefits brought about by sprouting. Now we have two ways of using sprouted grain in bread–dry flour and wet pulp—both of which provide the benefit of better nutrition and better flavor.


Can you explain more about the nutrition? It has long been known that when grains, seeds, and beans are sprouted, their nutritional value increases dramatically. Not only does the mineral and vitamin content increase but the starches are also affected by enzyme activity, releasing their natural sugars, and digestibility improves while lowering the glycemic load.

Now, just how much of the nutritional potential that survives the baking process is still being studied, but we’re seeing a lot of anecdotal evidence that shows positive digestive benefits. Of course, the fact that the sprouts are also whole grains is already a positive from a pre-biotic sense because of the increased fiber. I expect to see a lot of encouraging new studies emerge in the next few years.


What about the flavor? Why does it taste better? A seed or grain kernel is a highly concentrated package of nutrition designed to nourish new growth. Enzymes, which are small proteins that act as keys (or scissors) to break up carbohydrates or long protein chains, begin to activate when the seed is hydrated and germinated. There are a lot of implications of this activity but one is that nutrients are freed up, as are various sugars that can serve as food for both yeast and lactic bacteria (the good kind), resulting in better flavor and a richer color (that is, better eye appeal, not to be taken lightly when it comes to how we enjoy our food).

Do you address the gluten-free movement in Bread Revolution? I did not want to repeat what I wrote in my previous book, The Joy of Gluten-Free, Sugar-Free Baking, but Bread Revolution does offer a few new gluten-free recipes that feature sprouted gluten-free flours and nut flours. New information is coming out every day to clarify some of the misconceptions and false assumptions surrounding gluten and other allergens, so this category will continue to be an important part of the bread revolution.

Any new discoveries about sourdough bread? I keep learning more and more about the micro-biology underlying sourdough bread, so I included my latest findings in this book. As the research shows, there is something very different about bread made with natural wild yeast starters (aka natural leaven) as opposed to commercial yeast. I think that even more information is still to come that will show the health and digestibility benefits of naturally leavened bread, both whole grain and white flour versions.

Besides sprouted grains, what other “new frontiers” are happening in the bread world? The book takes a peek at flours made from grape skins and grape seeds, as well as varietal grape seed oils. In addition, I profile a new grain product called ProBiotein that serves not only as a healthy pre-biotic fiber supplement but also acts like a sourdough starter when added to bread dough. Flour made from the dried outer husks (called the “cherries”) of coffee beans also shows great promise in both culinary application and also in the natural healthcare market. In the last chapter, I explore the next new frontier by profiling a baker who has come up with a unique method of creating one-time-use starters.

How big do you think these new frontiers will get? Gluten-free went from a fringe movement to a multi-billion dollar industry, but not every new bread frontier tips over into something major. Sometimes a small wave can lead to a larger one later on, though; for example, I’m not convinced that grape skin flour will make a huge impact in bread baking, per se, but it clearly has many other nutritional and flavor implications that could inform health care products. I do believe sprouted grain flour is going to be a game-changer, which is why it’s the focus of this book.

You also wrote about an unusual sourdough bread method. Can you give us a little preview? A baker friend taught me a new method that involves making a starter using hand-squeezed (through a cheesecloth) apple, pear, or peach juice added to flour. He influences the flavor by resting various ingredients on top of the starter bowl to draw out particular micro-organisms. He uses parmesan cheese, coffee beans, and different types of fruit to create subtle flavors. He uses the starter only once, instead of feeding it to keep it going, because he worries that the starter will change its flavor profile if it is refreshed, which will cause him to lose control of the taste. A very interesting chapter.

What’s next? Are there bread frontiers not yet seen; any predictions? Considering that humans have been making bread for at least 6,000 years, it’s amazing that we’re still learning new ways to make it even better. Enzymes, bacteria, new strains of yeast, selective and directed seed breeding, small regional mills using locally-grown flour–the growth never seems to end. I think we’re actually headed into a golden era for bread. I’m thrilled to see what’s next!





I’m reading through Bread Revolution and looking forward to sprouting some berries and baking with them this weekend. I didn’t see a recommendation in the book for a grinder for the dehydrated sprouts – you did recommend a meat grinder for pulp. Some folks over at thefreshloaf recommended milling using a cheap coffee blade grinder, but I imagine that’d take forever with a pound of dehydrated sprouted berries. (I did try that with maybe 100g of dehydrated sprouted amaranth a few months back.) Thanks!


For the dried sprouts I’d suggest using a true flour mill rather than a coffee grinder, though it is a possibility. I haven’t tested home mills, though, but think most any brand will work well, though they are all an investment. If any readers have a suggestion, feel free to post it here. Thanks!


Everything I’ve learned about sprouting grain is for beer making so that the starch in the grain is converted to sugar when sprouted, which in turn is converted to alcohol if allowed to ferment long enough. Now if making bread with this same grain it should add more sugar as long as it does not sit and ferment out the sugar.This is the main flavor ingredient for beer and the drying and roasting of the grain after sprouting gives the beer different flavor profiles depending on how dark the grain is roasted which I assume would give bread different taste depending on darkness of roast too. Have you tried different levels of roasting with bread yet? What miller is making flour out of this sprouted grain? The difference in beer is that they use barley mostly and not wheat.I just got your Apprentice and pie book this week too and already upped my baking knowledge 100%..Thanks

Dan Elgart

Yes, I was about to say that any homebeer making supply store will have a quality grain mill available to use for free (uasually, free). And most micro breweries will give you all of their used sprouted grain.


I’ve been sprouting whole wheat and most other berries,dehydrating them before grinding in a Vitamix grain blender (which concerns me due to the heat that’s generated while grinding grain). As to spent sprouted grain such as from a brewery, it is my impression that they may have lost much of their nutrients. In making rejuvelac, a highly taunted fermented drink made simply from sprouting rye berries, the two-day day (or more) process causes the grain to be sogged and possibly denatured. I’d like to understand the science behind it and would appreciate feedback. I stumbled upon this website recently and can’t wait to get my own copy of Peter Reinhard’s book. Meanwhile I have the pizza dough for the sprouted grain pizza recipe resting in the fridge since yesterday. I can’t wait to test the result!

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Peter’s Books

American Pie
Artisan Breads Every Day
The Bread Bakers Apprentice
Brother Junipers Bread Book
Crust and Crumb
Whole Grain Breads

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