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Sourdough starter

Sourdough starter is a fermented flour-and-water mixture used to leaven bread and other doughs.

Sourdough starter — illustrative ingredient image

About Sourdough starter

Sourdough starter is a maintained fermented mixture of flour and water used to seed and leaven bread and other fermented doughs. A portion is refreshed before mixing into a final dough, where it supplies active microorganisms, acidity, and gas-producing fermentation.

Its flavour ranges from mildly tangy to sharply sour, depending on grain, hydration, temperature, age, and feeding routine. The texture may be pourable and batter-like or thick enough to hold a shape. Fermentation creates bubbles and changes the starter’s aroma, acidity, and consistency.

Colour follows the flour used, ranging from pale cream to brown. A starter may be kept as a liquid or stiff culture, refrigerated between feedings, or maintained at room temperature for frequent baking. Feeding with fresh flour and water increases activity and changes its volume and thickness.

Ingredient type
derived ingredient

Forms & related ingredients

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Where sourdough starter appears

9 linked foods

Find foods to recognise by country and type. Recipes and products vary; these are recorded ingredient connections.

Showing 1–9 of 9

Breads

Ingredient connections awaiting review · Coverage is still growing, including packaged snacks.

Name examples awaiting language review. Confirm the specific food or product.

Local names for sourdough starter

Names and romanised forms to recognise on menus and labels.

English

Sourdough starter

English

inactive sourdough starter

Search alias · Not a confirmed translation

Available names only. Languages may be spoken in other countries; a name alone does not identify every ingredient in a dish.

Sourdough starter nutrition & diet

Sourdough starter nutritional value

Representative benchmark: Mushroom, raw

Representative nutrition benchmarkOfficial table values for a comparable food category, not a laboratory measurement of this exact ingredient.

Per 100 g of 100 g edible portion in the named official reference form.

Calories
25kcal
Protein
3.7g
Carbs
1.1g
Fat
0.3g

Representative benchmark from a comparable official food-composition category; it is not a laboratory measurement of this exact ingredient. The displayed reference form must be considered, and species, cultivar, recipe, brand, processing and preparation can change values.

Portions & preparation

Use the flour-and-water culture at its documented age, hydration, feeding ratio, and discard status. A starter portion may be incorporated into dough or removed during maintenance, and those uses represent different amounts of flour and water. Do not substitute finished sourdough bread for the culture.

Compare the right form: Match the reference to fermented flour-and-water starter, specifying flour type, hydration, fermentation stage, feeding, and retained or discarded portion.

Diet considerations

Sourdough starter is plant-derived when its ingredients are flour and water, though the flour may be wheat, rye, or another cereal. Added dairy, eggs, honey, or other ingredients alter compatibility. Fermentation changes the preparation but does not make the starter cereal-free; incorporated flour contributes to the dish’s carbohydrate pattern.

AI-authored reading notes · Awaiting editorial review. Measured values, where available, have a separate source above.

Dietary compatibility

  • Vegan
    May be compatible
  • Vegetarian
    May be compatible
  • Pescatarian
    May be compatible
  • Keto
    Not established
  • Paleo
    Typically incompatible
  • Low-carb
    Not established
  • Halal
    Not established
  • Kosher
    Not established
What these diet assessments mean
Vegan · May be compatible
The recorded ingredients may fit this pattern. This is not a complete recipe or manufacturing specification; check additions and preparation.
Vegetarian · May be compatible
The recorded ingredients may fit this pattern. This is not a complete recipe or manufacturing specification; check additions and preparation.
Pescatarian · May be compatible
The recorded ingredients may fit this pattern. This is not a complete recipe or manufacturing specification; check additions and preparation.
Keto · Not established
A defined serving and sourced carbohydrate data are needed before assessing this dietary pattern.
Paleo · Typically incompatible
Recorded common ingredients: Wheat flour. This profile falls outside the conventional paleo pattern used here (grains and pseudograins, legumes, dairy or refined sugar). Recipes and products can differ.
Low-carb · Not established
A defined serving and sourced carbohydrate data are needed before assessing this dietary pattern.
Halal · Not established
Sourcing, processing and any applicable certification have not been verified. A food name alone does not establish halal status.
Kosher · Not established
Sourcing, processing and any applicable certification have not been verified. A food name alone does not establish kosher status.

For the plain ingredient · Awaiting review. Diet compatibility is not allergy suitability or halal/kosher certification. Keto and low-carb depend on the portion.

Reviewed ingredient entryIngredient reference · Preparations vary

AI-generated illustration for visual context. It does not identify a particular product or establish allergen content.

Sources & review

Nutrition reference: Swiss Food Composition Database 7.1 (2026) — 375 ↗. Values are scaled from 100 g of the recorded edible form. Individual portions have no assumed fixed weight.

Expanded overview, name examples and nutrition notes are database drafts awaiting editorial review. Numeric nutrition values, where shown, have their own source and food-form reference.

The ingredient description and dish connections come from the draft catalogue and may change after review.

Last recorded verification: .