How to Bake Sourdough Discard Crackers
Every sourdough baker faces the same guilt: a jar of discard you can't bring yourself to throw away. These crackers are the answer. Thin, shatteringly crisp, tangy from the fermented starter, and endlessly customisable — they take one bowl, one baking sheet, and about 35 minutes. You may start feeding your starter just to make more.
Total time: 35 min · Servings: About 40 crackers
Ingredients
- 240g sourdough discard (100% hydration, straight from the fridge is fine)
- 2 tbsp olive oil (or melted butter for richer crackers)
- 1/2 tsp fine sea salt
- 1 tbsp fresh rosemary (finely chopped) or 1 tsp dried herbs
- Optional: 2 tbsp finely grated parmesan
- Optional: 1 tbsp mixed seeds (sesame, poppy, flax)
- Flaky sea salt (for the top)
- Optional: cracked black pepper or chilli flakes
Instructions
- Preheat and prep: Preheat the oven to 165°C/325°F. Cut a sheet of parchment paper to fit your largest baking sheet — you'll spread the batter directly on it.
-
Mix the batter: Stir the discard, olive oil, fine salt, rosemary, and parmesan (if using) together until smooth. It should be a thick, spreadable batter — like pancake batter that overslept.
Tip: If your discard is stiffer than 100% hydration, loosen with a teaspoon of water at a time until spreadable. -
Spread paper-thin: Pour the batter onto the parchment and spread it as thin as you possibly can with an offset spatula — 2–3mm, thin enough to almost see the parchment through it. Even thickness matters more than neat edges.
Tip: Thin = crisp. Any thick patches will turn out chewy instead of snappy. Take an extra minute here. - Top and dock: Sprinkle evenly with flaky salt, seeds, and pepper or chilli flakes if using. Prick all over with a fork to stop it bubbling up in the oven.
-
Bake, then score: Bake for 10 minutes until the surface is set, then remove and quickly score into squares or diamonds with a pizza cutter. Return to the oven for another 15–25 minutes until deep golden and dry all the way to the centre.
Tip: Scoring halfway gives clean-edged crackers; skipping it gives rustic shards. Both are correct — shards look great on a cheese board. -
Cool to crisp: The crackers crisp fully as they cool, so let them sit on the tray for 10 minutes before breaking apart. If the centre pieces are still bendy once cool, return them to the oven for 5 more minutes.
Tip: Edges brown faster than the middle — pull off any dark outer crackers early and give the pale centre ones extra time.
Pro Tips
- Store in an airtight container at room temperature for up to a week. If they soften (humid kitchens), re-crisp at 150°C for 5 minutes.
- The batter takes any flavour direction: everything-bagel seasoning, za'atar, smoked paprika and cheddar, or cinnamon-sugar for a sweet version (skip the rosemary).
- No time to bake? Discard keeps in a sealed jar in the fridge for about a week — collect it across several feedings and bake one big batch.
Frequently Asked Questions
Do the crackers taste sour?
Mildly and pleasantly — closer to a good sourdough loaf than anything sharp. Older, more acidic discard (a week in the fridge) makes tangier crackers; fresh discard makes milder ones. Both are delicious.
Why are my crackers chewy instead of crispy?
They were spread too thick or pulled out too early. Aim for 2–3mm and bake until the centre pieces are fully dry and golden. Remember they also crisp further while cooling — judge them 10 minutes after they come out.
Can I use active starter instead of discard?
Yes — bubbly active starter works identically. The yeast activity doesn't matter here since the crackers are rolled thin and baked immediately; you're using the starter for flavour, not lift.
Is sourdough discard safe to eat?
Yes, as long as it's been stored in the fridge and shows no pink or orange streaks, fuzzy mould, or truly foul smell (a boozy grey liquid on top — hooch — is normal; just stir it in or pour it off).
Get step-by-step guidance with AI photo feedback on Kitchen's Witch. Paste any recipe video and we'll guide you through cooking it — or browse our recipe collection.