Supermarket sourdough has become a staple for many shoppers, offering a convenient and cost-effective alternative to artisanal bakery loaves. With numerous options available, discerning the best store-bought sourdough can be challenging. To address this, a comprehensive taste test was conducted, evaluating over 20 loaves from major supermarkets to identify the top performers based on crumb, crust, flavour, and shelf life.
Understanding True Sourdough
Before delving into the results, it is essential to clarify what constitutes genuine sourdough. According to experts, sourdough is not a legally protected term, meaning any bread can be labelled as such. True sourdough must be made with a live starter, a natural blend of wild yeast and bacteria, and undergo slow fermentation without added commercial yeast. Consumers should check ingredient lists for yeast, as its presence indicates a non-traditional loaf.
Top Supermarket Sourdough Picks for 2026
Best Overall: Wildfarmed White Sourdough Bread
Priced at £4 from Waitrose, this loaf stands out for its regenerative farming practices, using wheat grown to improve soil health and biodiversity. With a slight tang and pleasing chewiness, it is slow-fermented over 32 hours and hand-shaped. While it lacks an open crumb, its quality and ethical ethos make it a top choice.
Best Runner-Up: Gail’s San Francisco Sourdough
Available at Waitrose for £5, this artisan bakery loaf features a crunchy exterior and an open crumb, made with grains like spelt and rye for enhanced flavour. It is a classic option that performs well in various uses, from sandwiches to breadcrumbs.
Best Pre-Packaged: Bertinet Bakery Rustic Country White Sourdough
Costing £2 from Waitrose, this affordable loaf uses heritage grains and is free from preservatives. It offers a nice tang and works excellently as toast, with a texture reminiscent of wholemeal bread.
Best for Flavour: Waitrose No 1 White Sourdough Bread
Priced at £2, this pre-sliced loaf from Waitrose's premium range impresses with its intense tangy flavour. Though it lacks a crusty exterior, it has a good spring and makes exceptional toast.
Best Everyday: Exceptional by Asda White Sourdough Loaf
At £2, this pre-sliced option features an even crumb and decent structure, with a tangy flavour from aged wild yeast. It is one of the better packaged loaves available.
Best for Toast: Sainsbury's Taste the Difference White Sourdough Half Bloomer
Costing £2, this loaf is affordable but resembles conventional white bread more than sourdough. It is soft with a springy crumb, making it ideal for toasting.
Best Gluten-Free: Good Grain Bakery Gluten-Free Seeded Sourdough
Priced at £6 from Ocado, this dense, seeded loaf uses organic gluten-free flours. While typical of gluten-free breads, it is a decent replica for those with dietary restrictions.
Best for Even Crumb: Co-op Irresistible Slow Crafted White Sourdough Bloomer
At £3, this loaf has an evenly distributed crumb and a better crust than some competitors. It makes great toast, though it lacks a high rise.
Testing Methodology
The taste test involved analysing ingredient lists and sampling over 20 loaves, including own-brand and branded options. Each was evaluated plain, in sandwiches, and as toast, with criteria covering crumb texture, crust quality, flavour profile, and shelf life. Sourdough should have a spongy, open crumb with even air pockets, a tangy taste, and a shelf life of two to three days without preservatives.
Expert Insights
Swie Joo, head baker at The Palmerston, emphasises checking labels for yeast to ensure authenticity. The test confirms that while artisanal bakers excel, supermarkets like Waitrose and Asda offer commendable sourdough options, with Wildfarmed and Gail's leading in quality and innovation.
For more food reviews, explore guides on supermarket olive oils, butters, and pizzas, or seasonal picks like M&S hot cross buns. This analysis provides a reliable resource for elevating your weekly shop with the best sourdough choices.
