Duchy Originals has doubled production at its bakery since opening the plant in June.
The Cornish bakery has also increased its workforce, from 14 to 20 people, to keep up with production after signing a deal last month to supply more than 100 Sainsbury’s stores.
It already sells to Waitrose and Budgens with a range of 10 products including steak and cheese & onion pasties, lemon and fruit tarts and organic Cornish pasties. A new meat pie range will be launched in Waitrose next month.
"Distribution has greatly increased and the bakery is doing very well," said a spokeswoman. "We supply quite a few stores but we hope to sell into others in the future. It is early days but there is definitely potential to expand."
The 10,000sq ft bakery was built in Launceston last year.
The bakery - owned by the Prince of Wales’ estate - continues to source locally as much as possible and buys all its cream and milk from Cornish Organics and the meat for pies and pasties from Organic Livestock Farmers’ Co-operative of Cornwall and Devon.
Duchy Originals was set up by Prince Charles in 1990 to fund his charitable trust.