Ms Deeney, who is from Fochabers, Moray, runs a stall at various London markets selling Scottish products including a Macbeth haggis toasted sandwich with mustard and onions.
Some 16 months since setting up in business, she is complementing this with a range of haggis customers in time for Burns Night.
Ms Deeney said: "I was keen to get a butcher on board from the area I grew up in and award winning Bel's Butchers of Edzell was a great fit.
"Annabel Forbes has a fantastic butchery and shop and is in line with my female entrepreneurial spirit."
Deeney's will sell the haggis at £10 a kilogram to both wholesale and retail customers.
It will be available in 390 gram rounds or larger catering sticks of 1.5 kilograms.
The firm will also supply a larger chieftain haggis for the address to the haggis at Burns Suppers.
Deeney's has suggested that customers can either use haggis in a traditional manner or as a substitute for other meats to create the likes of haggis lasagne or haggis pizza or alongside poached eggs as a breakfast dish.
Ms Deeney, a Glasgow university business and management graduate moved to London four years ago to pursue a career in advertising.
Her decision to move into catering was a return to her roots. For 13 years, the Deeney family ran the Quaich cafe in Fochabers, where she was the "Saturday girl".