The Grumpy Baker is a bakery on Ironbridge Road in Tongwynlais, making sourdough and yeasted loaves from water, flour, salt, yeast and time. It uses local organic flour, Welsh water and Welsh sea salt, and for its sourdoughs it keeps a home-grown starter maintained in Tongwynlais. Both sourdough and yeasted breads are slowly fermented, with loaves such as White(ish) Sourdough fermented and proved for more than 18 hours.
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Food Hygiene
Rating
5
Very good
FHRS ID: 1410963
Last verified: June 2026
KNOWN FOR
Product range may vary.
Croissant Aux AmandesPain au Chocolatcinnamon bunsWhite(ish) sourdoughCheese and Chili sourdoughDate and walnut sourdoughSeeded sourdoughbrowniespizza dough
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Data notice: Local Welsh Food uses UK Food Standards Agency (FHRS) records plus producer websites/social profiles. We aim for accuracy, but details can change (links, buying options, product ranges). If something looks wrong or out of date, email [email protected].