Leaven
What is Leaven?
Leaven is a starter culture, typically made from flour and water, that contains wild yeasts and bacteria. It is used to naturally ferment dough, causing it to rise and develop a characteristic tangy flavour and chewy texture. Leaven is the traditional method of leavening bread before commercial yeast became widely available.
Is Leaven vegan?
Leaven is not animal-derived. Products that contain it can still include other animal-derived ingredients, so check the full ingredient list.
Is Leaven gluten-free?
Leaven is derived from cereals containing gluten (flour).
What is Leaven used for?
Leaven is primarily used as a leavening agent in bread and baked goods, imparting a distinct flavour and improving texture.
Is Leaven safe?
Leaven is not a food additive and therefore does not have an E-number or require authorisation on the Register of Food Additive Authorisations.
Why it's used
Leaven is primarily used as a leavening agent in bread and baked goods, imparting a distinct flavour and improving texture. It is favoured in artisan baking for its complex taste profile and is commonly found in sourdough breads, brioche, and certain types of rolls.
Health notes
Leaven is not a food additive and therefore does not have an E-number or require authorisation on the Register of Food Additive Authorisations. The fermentation process involved in leavening can predigest some of the gluten and starches in the flour, potentially making the bread easier to digest for some individuals.
Allergen info
Leaven is derived from cereals containing gluten (flour). Therefore, gluten is a key allergen that must be emphasised on UK labels when leaven is used in a packaged food.
Foods that contain Leaven
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