Stop Slowly Killing Your Sourdough: How to Feed for a Stronger Starter
The number one mistake I see beginner sourdough bakers make is religiously following their original instructions on how to feed sourdough starter.
If told to feed 1/2 cup flour and 1/2 cup water per day, they continue that cycle even as the starter grows. Eventually, they’re left with 4 cups of “half-dead” starter that can’t even lift a loaf of bread. There’s just one thing they don’t understand yet:
Sourdough needs to double.
The Math of a Healthy Starter: How to Feed Sourdough
If you have 1/2 cup sourdough, it needs to be fed at least 1/2 cup flour and enough water to make it a thick lumpy batter with no dry pockets of flour. But if you have 4 cups of starter, that “monster” needs 4 cups of new flour to stay healthy.
I know that sounds insane — now you have 8 cups! So, what’s the solution? Use these two principles to keep your starter from devouring the flour budget whole:
- Shrink Before You Feed: “Discard” or use up your sourdough before feeding, making sure to leave about 1/2 cup starter left to feed
- The “Hibernation” Hack: Keep your starter in the refrigerator. It slows its growth down so it only needs to be fed once a week in the fridge.
Frequency Guide: How Often Should You Feed Sourdough?
Understanding the timeline of your starter’s hunger is a crucial part of learning how to feed sourdough successfully. How often you feed depends entirely on where your starter lives and how often you plan to bake.
Keeping It on the Counter (Active Baking-Feed Daily)
If you keep your starter at room temperature on the kitchen counter, it is burning through its fuel quickly. You will need to commit to feeding it daily. If it is cold in your kitchen like in the early spring or winter you might be able to get away with every other day. However, if your kitchen is particularly warm or it is the peak of summer, you may technically need to feed it twice daily to keep up with its fermentation.
Keeping It in the Fridge (In Between Baking-Feed Weekly)
For most home bakers, keeping a starter on the counter is too much maintenance. This is why the refrigerator is your best friend. By keeping it chilled, you slow the fermentation way down, so you only need to feed it once a week. When you are ready to bake, simply pull it out a few hours in advance, give it a warm feeding, and let it wake up. It usually takes 4-5 hours after getting out of the fridge and being fed generously to activate, also known as get all bubbly and rise.
The Secret to a “Stronger” Starter
Want a more robust, healthy rise to your loaves? Here is the real secret:
You can NOT over-feed a sourdough starter.
If you need to “resurrect” some near dead starter feed it over double its volume for a feeding or two and see how healthy and bubbly it gets.
This might sound crazy if you have been obsessing over measuring everything perfectly, but I don’t measure. I just eyeball it when I double my flour and err on the side of more than double (most times I actually do a lot more, as in triple or quadruple). Then I add water and mix until it is a lumpy batter consistency with no dry flour pockets.
What About the Discard?
Before you despair about being up to your eyeballs in extra starter, remember: Anything that is made with flour and liquid can be made with sourdough starter.
You don’t even need new recipes. There is a simple equation for substituting starter into the family favorites you already use. Plus, you can even use that discard to replace buttermilk and other acidic ingredients to activate baking soda
Click here to learn my Simple Substitution Equation & Technique
