How to Use 150g (0.63 Cups) Sourdough Discard in Chewy Sourdough Discard Bagels
Zero-waste baker's math to fold 150g of unfed sourdough discard into chewy sourdough discard bagels without making the batter gummy or runny.
Scale the chewy sourdough discard bagels formula once and you are done: 500g flour minus the 75g inside your 150 g of discard is 425g, and 285g of warm water minus the 75g it contains is 210g. Add 0.8g of baking soda and cook at Boil 60s + 425°F for 20 min.
- Subtract Recipe Flour
- -75gUse 425g instead of 500g
- Subtract Warm
- -75gUse 210g instead of 285g
- Acid-Neutralizing Soda
- 0.8gReacts with discard lactic acid for CO2 lift
- Cook / Bake Spec
- Boil 60s + 425°F for 20 minBoil 60s + 425°F for 20 min
Flour, Liquid & Soda Deductions for 150g of Discard in Chewy Sourdough Discard Bagels
Baseline Chewy Sourdough Discard Bagels recipe: 500g flour and 285g warm water, with the 150g discard decomposed into its hidden flour and water.
| Discard Hydration % | Flour Carried In | Water Carried In | Fresh Flour Needed | Fresh Warm Water Needed | Bicarbonate Buffer |
|---|---|---|---|---|---|
| 150g @ 100% [Baseline] | -75g flour | -75g Warm Water | = 425g flour | = 210g Warm Water | +0.8g soda |
| 160g @ 125% Stiffer Discard | -71.1g flour | -88.9g Warm Water | = 428.9g flour | = 196.1g Warm Water | +0.8g soda |
| 140g @ 50% Wetter Discard | -93.3g flour | -46.7g Warm Water | = 406.7g flour | = 238.3g Warm Water | +0.7g soda |
| 170g @ 100% Lighter Discard | -85g flour | -85g Warm Water | = 415g flour | = 200g Warm Water | +0.9g soda |
| 130g @ 75% Heavier Discard | -74.3g flour | -55.7g Warm Water | = 425.7g flour | = 229.3g Warm Water | +0.7g soda |
Dynamic Stoichiometric Workbench (-75g)
Test custom loaf weights or alternative fermentation schedules directly against the -75g benchmark above.
Food Chemistry: Why 150g of Unfed Discard Improves Chewy Sourdough Discard Bagels
The final structure of chewy sourdough discard bagels is decided by the ratio of the 425g of fresh flour to the 150g of fermented mass, not by the flour to liquid ratio alone. A high discard ratio replaces enough native gluten that the finished texture depends more on the retained sugar and the fat in the recipe than on the protein network.
The discard's own flour carries salt with it. Expect the 425g of fresh flour in your chewy sourdough discard bagels recipe to need slightly less salt than the original formula, because the 150g of discard was itself salted when it was last fed.
How to Mix Chewy Sourdough Discard Bagels with 150g Sourdough Discard
- Whisk 150 grams Discard Into Wet Ingredients: Combine 150 grams of discard with 210g warm water (down from 285g) until homogeneous.
- Adjust Dry Flour & Leavening (425g): Weigh 425g flour (-75g) and whisk in 0.8g baking soda.
- Rest Before Cooking (10 minutes): Let the acid in the 150 grams of discard finish reacting with the bicarbonate so the batter tastes clean rather than sharp.
- Cook at Boil 60s + 425°F for 20 min: Fold wet and dry mixes gently so the 150 grams discard formula stays light.
Key Baker's Math Questions (Subtract Recipe Flour: -75g)
How long should I rest the chewy sourdough discard bagels batter after mixing in discard?
Ten minutes is the sweet spot at room temperature. It lets the 0.8g of bicarbonate finish neutralising the discard's acid while the 425g of flour hydrates around the 210g of liquid.
Why is my chewy sourdough discard bagels spreading more than the original recipe after adding discard?
Almost always because the 75g of water inside 150 g of discard was not deducted. Correct the liquid to 210g, and brown the butter or add an extra fat to lock the remaining moisture.
Can I make this recipe with 75g of leftover starter instead?
Halve every weight: 38g of flour and 38g of liquid come out of the base recipe, and you need 0.8g of baking soda.