FAST-food giant McDonald's served up better-than-expected third-quarter sales, boosted by its breakfast menu and a strong performance in the UK.

The world's biggest burger chain saw global sales notch up 3.5 per cent in the three months to the end of September, above analyst expectations of 1.3 per cent.

A growing customer appetite for its all-day breakfast menu and chicken nuggets with no artificial preservatives helped US sales lift 1.3 per cent over the period.

It comes as the company looks to add more items to its all-day breakfast menu and test a Happy Meal for kids with an egg and cheese McMuffin.

Shares in McDonald's were up more than two per cent in New York following the update.

Chief executive Steve Easterbrook said: "Our third-quarter results, including our fifth consecutive quarter of positive comparable sales across all segments as well as improved restaurant profitability, are a testament to the progress we are making to satisfy the needs of today's dynamic customers."