Vilain Levain is a French brand founded by Valérie, a sourdough enthusiast and home-baking instructor known online as @vilainlevain. It helps people learn to make naturally leavened bread at home through practical methods, products and workshops designed to make sourdough baking more accessible and build confidence.

The brand’s shop offers natural dehydrated sourdough starter, made from Valérie’s own culture and reactivated at home using step-by-step instructions. Its product range also includes starter kits and themed boxes, baking accessories, printed books and ebooks covering sourdough bread and related recipes, including bagels and baguettes. Customers can also explore workshops on starting a natural starter and making sourdough bread from start to finish. Vilain Levain shares guidance through its blog and promotes a community of home bakers, which it says includes more than 50,000 fans on social media. Its approach emphasizes fermentation, natural ingredients and the enjoyment of making homemade bread without relying on added baker’s yeast.