The Supreme Award judging panel of chefs and food critics, including Sat Bains, Bruno Loubet and Charles Campion, chose the winner from a shortlist of 12 products that emerged as regional winners from three months of judging this year's 6027 entries.
The panel said the cobnut oil was "excellent, magnificent and has a very clean length… simply a beautiful artisan product and a truly British product".
Hurstwood Farm is the only commercial producer of cobnut oil in the UK and each nut is hand picked before going through the process of drying, shelling and then pressing. It takes over a kilo of picked nuts to produce each 250ml bottle of oil.
For a full list of products that achieved one, two and three gold star ratings visit www.greattasteawards.co.uk
Best Speciality from the Midlands and East AngliaThursday Cottage - Damson Fruit Coulis from Tiptree
Best Speciality from the North of EnglandWensleydale Dairy Products - Jervaulx Blue
Best Speciality from Northern IrelandMullin's Ice Cream
Best Speciality from the South EastLaverstoke Park Farm- Buffalo fillet steak
Best Speciality from the South West - Bramley & Gage - Six o'clock Gin
Best English Speciality Joint winners: Laverstoke Park Farm - Buffalo fillet steak & Wensleydale Dairy Products - Jervaulx Blue
Best Irish SpecialityUmmera Smoked Products - Silver Hill Smoked Duck
Best Scottish SpecialityReids of Caithness - Traditional all butter shortbread Best Welsh SpecialityRhug Estate - Sirloin of Beef
Ambient Product of the YearHurstwood Farm - Virgin cold-pressed 100% Kentish cobnut oil
Best First Time EntrantLittle Rose Bakery
Speciality Importer of the YearOlives Et Al
Speciality Producer of the YearKendal Jacksmiths