What to Do With Sourdough Discard (Without Pretending You Enjoy It)

Discard is the part of sourdough nobody warns you about. You feed the starter, half of it comes out, and you're left holding a jar of flour-and-water paste that feels wrong to bin and isn't obviously food.

Here's the practical version: what it actually is, what to do with it, and the answer most guides skip — how to produce less of it.

What discard is

It's starter that hasn't been fed recently. Fermented, acidic, full of flavour, and low on the leavening power that makes bread rise. That's the whole distinction. It's not spoiled and it's not waste in a food-safety sense — it just won't lift a loaf on its own.

Which is why every good discard recipe uses a separate raising agent. Baking powder or soda does the lifting; the discard brings sourness and depth.

The three things worth making

Crackers — the best use, by a distance

Mix discard with a spoon of olive oil, a good pinch of salt, and whatever you like — rosemary, sesame, cracked pepper, a bit of grated hard cheese. Spread it as thinly as you physically can on baking paper. Bake at around 175°C for 20–30 minutes until it's dry and snapping rather than bending.

They're better than most shop crackers, they keep for a week in a tin, and thinness is the only variable that matters. Too thick and you get chewy discs.

Pancakes and waffles — the easiest

Discard, an egg, a splash of milk, a spoon of sugar, half a teaspoon of bicarbonate of soda. Mix, rest ten minutes, cook as normal. The sourness plays well against maple syrup or jam, and the texture is noticeably better than a standard batter.

This is the one to do on a Saturday morning when you've fed the starter and want the discard gone by lunchtime.

Flatbreads — the fastest

Discard, enough flour to make a soft dough, a pinch of salt, a splash of oil. Roll thin, dry-fry in a hot pan for a minute or two a side. Ready in fifteen minutes, and they're the right thing for soup.

Storing discard

Keep a separate jar in the fridge and add to it over the week. It'll hold for a week or two, getting more sour as it goes — which is fine for crackers and flatbreads, and starts to be noticeable in pancakes.

Bin it if it grows fuzzy mould of any colour, turns pink or orange, or smells of anything other than sour. Dark liquid on top is hooch and is completely normal — stir it in or pour it off.

You can also freeze it in an ice cube tray. Thaw in the fridge overnight.

The answer nobody gives: make less of it

Most discard exists because people keep a bigger starter than they need. If you bake one loaf a week, you don't need 200g of starter sitting in the fridge — you need about 30g, fed up to what you need the day before you bake.

Keep a small starter. Feed it in the fridge once a week. Build it up before a bake. Discard drops to almost nothing, and you save a surprising amount of flour over a year.

The reason most guides don't lead with this is that a small starter feels precarious. It isn't — it just needs a scale that reads single grams, because at 30g the ratios stop being forgiving.

Things discard is not good for

It won't raise bread on its own. It won't rescue a dead starter — that needs feeding, not repurposing. And it isn't a health food; it's flour and water that's been fermented, with the same calories it started with.

While you're at it

Discard cooking is messy in a way that bread baking isn't — thin batters, sticky spatulas, cracker paste flicked across the counter. An apron earns its keep here. And if you're at the stage where the fridge has a dedicated shelf, our list of things only sourdough bakers understand will read as documentary.

Questions we get asked

Can I use sourdough discard to make bread rise?

Not on its own — unfed starter doesn't have the yeast activity for it. Discard recipes work because baking powder or soda does the lifting while the discard adds flavour.

How long does discard keep?

A week or two in a sealed jar in the fridge, getting more sour as it goes. Freeze it in cubes for longer. Throw it out if it shows mould, turns pink or orange, or smells off.

What's the easiest discard recipe?

Crackers. Discard, oil, salt, herbs, spread very thin, 20–30 minutes at 175°C. The only thing that can go wrong is spreading it too thick.

How do I stop having so much discard?

Keep a smaller starter — around 30g is enough for a weekly loaf — and build it up the day before you bake. A scale that reads single grams makes small starters easy to manage.