Really Sour San Francisco Sourdough

I mixed up a batch of basic white sourdough with my San Francisco Starter yesterday. I allowed it to bulk ferment for eight hours. I shaped the loaves and put them into the refrigerator overnight for about 12 hours. This morning I took them out and let the dough raise for about 3 more hours. The bread came out great and after several hours of cooling the taste developed into a really sharp sour! I am very happy with this batch. Here are some pictures:

I baked up four loaves, two two pounders and two 1.5 pounders.

Here is the crumb of the first loaf:

The San Francisco Starter is at it’s best when you do the long slow proofing and retarding overnight. It is slow, but that is the only way you can get a really good sour. Any proofing too short and you will lose out on flavor.