You have a prized dehydrated sourdough starter. Now What? Here are the step by step instructions for Re-hydration. If you want advice in general about Sourdough feeding and care read our article here. The recipe below is basic so if you are really new to sourdough starters you should read the other article first.
Seven Days to Reactive Dried Sourdough Starter
To Reactive Dried Sourdough Starter is simple but it takes about a week. Unfortunately, you can’t mix a little dry sourdough starter with flour and water have it ready to go that day. Because too much flour and water at once will overwhelm the starter you need to let it grow a little bit each day. Here are the directions to slowly build up the starter each day. The process of reactivating a dry sourdough starter usually takes about a week.
In a quart mason jar mix 2 teaspoons dry sourdough starter with 2 tablespoons warm water (80 to 85°F) and let sit for several minutes to soften and combine.
Use a fork or spoon to stir it on occasion until dissolved.
Feed it the first day by Mixing in 1 tablespoon of flour with the water and softened starter mentioned above. Cover the jar with a lid to keep out dust or bugs. Let set in a warm location for a day
(start thinking of names for your new pet :)
Day Two and Three
Feed it daily for the next two days by mixing in 1 Tablespoon flour and 2 teaspoons water.
You should see some bubbling by now. You can start to feed more. If it is super warm weather your starter may be growing faster. If it is colder it will take longer.
Feed 1/3 cup flour and 1/4 cup water.
Day 5, 6 and 7
Now the starter should be bubbling and activating. You can feed it like a mature starter measuring out some starter, using or discarding the leftovers and feeding the measured portion.
Here are the directions for feeding from here on out. If you don't have a scale to weigh ingredients the ratio is about 1/2 Cup starter: 1/2 Cup flour: 1/3 Cup Water. Weighing ingredients is superior to measuring but we have been getting by for centuries without scales!