An investigation into suspected illegal meat manufacturers in Sydney has uncovered a range of products from dodgy backyard butchers.

Primary Industries Minister Steve Whan says the NSW Food Authority found 29 of the 80 meat products assessed were produced by unlicensed operators, adding,

"In some cases, these unregulated products are then sold to the public through small retail outlets, delis, restaurants, cafes and weekend farmers’ markets.”

The crackdown resulted in the issue of a number of enforcement actions, including 27 penalty notices, five improvement notices, four prohibition orders and ten warning letters.