Why Does Discard Exist?Before you understand what you can do with discard, it helps to understand why it exists in the first place.It isn’t a side effect of something going wrong — it is a structural, built-in part of how a sourdough starter works.The Problem Feeding SolvesA starter needs regular fresh flour and water to remain active. Without that food, the available nutrients eventually run out and the culture becomes weaker.So you feed it — but if you only keep adding flour and water without ever removing anything, your jar grows a little larger every day.After a few weeks, you could end up with kilograms of starter simply because you never removed any.Why Removing Is Just as Important as FeedingThere is another reason, more subtle than simply controlling the volume.If you keep adding without removing anything, the balance between the existing, mature starter and the fresh food keeps changing.The more old starter there is in relation to the new food, the less food is available to each microorganism.By regularly removing a portion before feeding, you restore that balance and give the remaining culture enough fresh food to stay active and healthy.That removed portion — the discard — is therefore not a mistake in the process, but a necessary consequence of maintaining a healthy starter.How Much Discard Do You Get?That depends on how you feed your starter.With a 1:2:2 ratio — for example, 25 grams of starter, 50 grams of flour and 50 grams of water — you produce relatively little discard because you begin with a small amount of starter.Feed more frequently, or in larger quantities, and you’ll naturally produce more discard.See Feeding Your Starter for the full explanation behind these ratios.Is There a Way to Avoid Discard?Not really, if you want to maintain a healthy, active starter.Some bakers try to minimise discard by keeping a very small mother starter and only building it up to the amount they need shortly before baking.See the distinction between mother starter and baking starter in Feeding Your Starter.This can reduce the amount of discard, but eliminating it completely isn’t particularly realistic — and it isn’t necessary either.After all, discard isn’t a problem that needs to be solved. It is a useful by-product.A Change in PerspectiveOnce you stop seeing discard as waste and start seeing it as a second ingredient your starter gives you every time you feed it, the feeling that something is being “wasted” disappears.It is simply a natural part of maintaining a living system — as inevitable as pruning a plant from time to time to keep it healthy.Part of the Discard Hub.Continue reading: What Is Discard? · Why You Should Never Throw Discard Away