The company showcased the multi-grain flour, which is a blend of brown rice, quinoa, sorghum, millet and teff, in pancakes, sandwiches, pasta and snack foods at the expo.

The Omaha based firm hopes the flour will increase its share of the $300 million gluten-free food industry.

Marketing vice-president, Mike Veal, said: "Gluten-sensitive consumers crave food with the same visual, texture and flavour appeal as mainstream products. With this new flour we can help manufacturers provide gluten-sensitive consumers and their families with nutritious foods that they will look forward to eating."

Nielsen estimates a 15 per cent yearly growth for the gluten-free industry.

Other products in ConAgra's gluten-free range include amaranth flour, quinoa flour, millet flour and teff flour.

All products are certified by the Gluten-Free Certification Organisation.