German Rye Sourdough (Saurteig) 

ALLOW 1 DAY TO ACTIVATE THE CULTURE; 2 TO 10 DAYS TO FEED THE CULTURE; 
12 TO 24 HOURS TO REFRESH THE CULTURE 

German rye sourdough is a thick, porridgelike mixture of spring water and 
stone­ ground rye flour that quickly becomes a hospitable environment for 
natural yeast. Of all the sourdoughs in this book, rye is the fastest to 
ferment and the sourest. German and Austrian bakers don't just use it for its 
sour flavor, however. Rye flour contains abundant amylases, enzymes that break 
down starches in the dough, which can result in bread with a dense, sticky 
crumb. The abundant acids in rye sourdough slow the breakdown of starches. 
Bread baked with rye sourdough is more elastic, rises higher, and has a more 
open, stable crumb. In short, if you use rye sourdough, you won't wind up with 
a rye bread doorstop. 

This recipe walks you through the process of creating a rye sourdough from 
scratch. It takes between 4 and 10 days to activate the culture but requires 
just a few minutes of your time each day. It's impossible to say exactly how 
long the recipe will take, because the speed of fermentation depends on a host 
of vari­ ables, including the composition of your flour and the climate in your 
kitchen. The most important thing you can do is pay attention to your 
culture-and be patient. Stir it, smell it, taste it. This is what bakers do 
every day, and it is the only sure way to determine the ripeness of your 
culture. When you first mix the water and rye flour together, the culture will 
be very thick and sludgy. Over the next few days, as you mix in more water and 
flour-and oxygen-it will become spongy and airy, thinner and easy to stir. 
You'll see it come alive, growing bubbly and developing a pungent, tangy smell. 

As with other sourdoughs, I recommend using spring water and organic stone­ 
ground flour to create the best environ­ ment for developing a culture. Tap 
water and highly processed flours may contain yeast- and bacteria-killing 
contaminants. Once you've established the rye sour- dough, you can store it in 
the refrigerator and keep it indefinitely by feeding it once a week with fresh 
water and flour. 

Equipment CLEAN, CLEAR 2-QUART CONTAINER 

Day 1 Spring water, tepid (70 to 78 degrees) 1/4 cup Organic, stone-ground rye 
flour, preferably finely ground 1/2 cup 

Day 2 Spring water, tepid (70 to 78 degrees) 1/4 cup Organic, stone-ground rye 
flour, preferably finely ground 1/2 cup 

ACTIVATE THE CULTURE. Pour the water into the container and stir in the rye 
flour until it is fairly smooth. It will be quite thick. Scrape down the sides 
cover the container with plastic wrap. Let it stand at room temperature (70 to 
75 degrees) for 24 hours. 


OBSERVE AND FEED THE CUL TURE. Uncover the culture and observe any changes. 
It's still early, but the culture may have risen slightly. It will have a sweet 
and musty smell and taste mildly tangy. 

Pour the water into the container and stir with a rubber spatula to loosen it 
slightly. Add the rye flour and and stir vigorously to oxygenate the culture 
and blend until it is smooth. It will be somewhat looser than on the previous 
day but still quite stiff, like oat­ meal. Scrape down the sides and cover the 
container with plastic wrap. Let the culture stand at room tem­ perature (70 to 
75 degrees) for 24 hours. 

Day 3 Spring water, tepid (70 to 78 degrees) 1/4 cup Organic, stone-ground rye 
flour, preferably finely ground 1/2 cup 


OBSERVE AND FEED THE CULTURE. Today your culture will have risen up the sides 
of the container and may have already fallen. The surface will be bub­ bly, and 
if you hold up the container, you'll see bub­ bles on the sides and bottom. 
Smell its earthy, acidic aroma and taste the sour flavor. Pour the water into 
the container and stir to loosen the sourdough. You'll notice short strands of 
gluten floating through the water. Add the rye flour and stir vigorously to 
oxygenate the culture and blend the fresh flour into the sourdough. Scrape down 
the sides and cover the container with plastic wrap. Let it stand at room 
temperature (70 to 75 degrees) for 24 hours. 

TEST THE CULTURE. Uncover the container and examine the culture to determine 
whether it is ripe enough to become a rye sourdough. By now it will have become 
a darker gray-brown and expanded dra­ matically, maybe doubling. It will be 
spongy-looking and filled with small bubbles all the way through. It will smell 
pungently sour and acidic, like a combina­ tion of overripe apples and moist 
fall leaves. When you taste it, the acid will sparkle on your tongue. If your 
culture doesn't show this much activity, don't worry. Repeat the steps for day 
3 every 24 hours for up to 6 more days. Use warm  (85 to 95 degrees) water in 
place of tepid water, and be sure to keep the container in a warm (75 to 80 
degrees), draft-free place. You may need to transfer it to a larger con­tainer. 
After these additional feedings, if your culture does not look active, the 
flour may have been old, the water may have been too chlorinated, or the 
con­tainer may not have been spotlessly clean. If your culture does look ready, 
repeat the recipe from day 3, but check the culture after only 12 hours. Scrape 
down the sides and cover the container with plastic wrap. With masking tape, 
mark the spot on the container that the sourdough will reach when it has 
doubled in volume. Let it stand at room tempera­ture (70 to 75 degrees) for 12 
hours. You'll know you have a strong, healthy sourdough when it almost doubles 
and is spongy and filled with large and small bubbles after 12 hours. It will 
smell pungent and taste tangy. Refresh the sourdough (see below) before 
proceeding with the rye bread recipe of your choice. When you have successfully 
cultivated a rye sour­ dough, you must add water and rye flour to it on a 
regular basis to keep it in shape for bread baking. The yeast and bacteria that 
provide leavening power and great flavor need periodic nourishment. I recom­ 
mend that you refresh your rye sourdough at least once a week and store it in 
the refrigerator when you're not baking. In the cold, it will slowly ferment. 
The 12- to 24-hour time range gives you flexibility to bake either in the 
morning or in the evening. Just be aware that the longer the sourdough ferments 
after refreshment, the more sour it and the bread you bake with it will be. 

Day 4 Spring water, tepid (70 to 78 degrees) 1/4 cup Organic, stone-ground rye 
flour, preferably finely ground 1/2 cup 



REFRESH THE SOURDOUGH. Measure 1/4 cup (1.8 ounces/so grams) of your culture 
into a clean i-quart container and discard the rest. (After you've been baking 
with your sourdough consistently, the exact amount is not critical; just make 
sure there is room in the container for the sourdough to expand.) Stir in the 
water and rye flour vigorously with a rubber spatula until the culture is 
fairly but not perfectly smooth. Scrape down the sides and cover the con­ 
tainer with plastic wrap. 

If you plan to bake, mark the container with mask­ ing tape to indicate the 
level the sourdough will reach when it doubles in volume. Let it stand at room 
temperature (70 to 75 degrees) for 12 to 24 hours. It is ready when it has 
expanded to twice its original size and tastes very tangy. It may already have 
deflated. If you do not plan to bake within 
24 hours, leave the sourdough at room temperature for 1 hour and then 
refrigerate it. 

MAINTAIN THE SOURDOUGH. If your sourdough has been in the refrigerator for a 
week, it is time to refresh it again, whether or not you plan on baking. Weeldy 
refreshment will keep it alive and healthy, so that when you do bake, it will 
be capable of raising your dough. Just repeat the steps for refreshment and 
refrigerate it again for up to 1 week. 

PREPARE THE SOURDOUGH FOR BAKING. Whether or not you have refreshed your 
sourdough recently, you must refresh it 12 to 24 hours before you want to bake 
to ensure that it is in optimum shape for raising and flavoring bread. Follow 
the refreshment steps described above. After the sour­ dough has fermented at 
room temperature (70 to 75 degrees) for 12 to 24 hours, measure out what you 
will need for your recipe. Then place 1/4 cup (1.8 ounces/so grams) of what is 
left over in a clean con­ tainer, refresh this portion, and refrigerate for up 
to 1 week for use in the future. 

Variation: Spelt Sourdough Spelt bread, made with an ancient variety of wheat, 
can be found in bakeries throughout Ger­ many. Some German bakers simply use 
rye sourdough as the foundation for their spelt breads, but some, who want to 
produce 100 percent spelt loaves, use a similar starter made with spelt. To 
make a spelt sourdough, simply substitute whole spelt flour wherever rye flour 
is called for in the above recipe. The color will be different, more brownish 
than gray. It will rise more than a rye sour because spelt contains gluten to 
create pockets for trapping gases. But otherwise, spelt sour­ dough will work 
in exactly the same way as a rye starter to raise your bread. 


Local Breads by Daniel Leader


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