"Our staff have been working around the clock to meet the next lot of orders with the number of supermarkets ranging the products growing from five to 31 within a fortnight.
"It is clear that there is significant interest in both traditional Māori and Asian foods. We have also heard of customers stockpiling and buying 10 or more packets at a time," she says.
The product is proving particularly popular in Central North Island regions such as East Cape, Rotorua, Hawke's Bay, Palmerston North and New Plymouth.
The manufacturer is now looking at expanding the range to include a vegetarian option of the hāngi flavoured buns.
Sevao says with the product having sold out twice within as many weeks, normal shipments have now resumed, and additional production is scheduled to service the growing number of supermarkets ordering the product each day.