The 75-cover pub is run by MasterChef: The Professionals 2012 joint winner Anton Piotrowski and wife Clare.
The couple also opened a second site the Springer Spaniel in Launceston, Cornwall, in January.
Clare Piotrowski said: “We are over the moon to have got the Michelin star. Bookings have increased by treble.
“We allow six months in advance for bookings. We have been in all the national papers as well as the local papers and the local news, which has also had a great impact.”
A la carte
Sample dishes on the Treby Arms a la carte menu include starters of herb crusted duck egg, hash browns, girolle mushrooms (£7.95); veal sweetbreads, cauliflower purée, hazelnuts, wild herbs, veal jus (£12.95); and Devon crab, brown bread and butter ice cream, passion fruit and tomato foam (£9.95).
Mains feature cocoa venison, colcannon, field mushroom with foie gras and salami, baby gem (£25.95); and Creedy Carver duck breast, roast pear, red cabbage, broccoli purée and ale braised carrots (£24.95).
Treby classic dishes include Treby’s burger of BBQ venison, lettuce, tomato, mayo and brioche bun with truffle and Parmesan fries (£12.95) and white wine battered fish & chips with chip shop treats (£14.95).
The Treby Arms was named the highest new entry in the Budweiser Budvar Top 50 Gastropub Awards 2014.
Entries are open for three categories in the 2015 awards. See www.top50gastropubs.co.uk for more information on how to enter. The closing date for entries is 17 October 2014.
The Cross at Kenilworth, Warwickshire and Andrew Pern’s Star Inn at Harome were the other two pubs to achieve new stars, bringing the number of pubs with Michelin stars to 16. Pern regained the star he lost three years ago.
James and Kate MacKenzie’s, Michelin-starred pub the Pipe and Glass in South Dalton, East Yorkshire is adding three new three new bedrooms to the site. They will open in January 2015, giving the pub five luxury bedrooms in total. A new kitchen garden is also due to open in the Spring.
Tom Kerridge’s Hand & Flowers in Marlow, Buckinghamshire, remains the only pub to hold two Michelin stars.