McDonald's Corp reported better-than-expected quarterly same-restaurant sales as the launch of all-day breakfasts proved to be a hit with diners in the United States and demand continued to recover in China. 

The world's biggest restaurant chain's shares jumped 3.4% in premarket trading on Monday.

McDonald's introduced all-day breakfasts in October in the United States, allowing customers to tuck into its popular Egg McMuffins and Hash Browns any time of the day.

The move was aimed at countering increasing competition from chains such as Wendy's Co, Starbucks Corp and Burger King, which have been doubling down on their breakfast offerings.

McDonald's returned to sales growth in the United States in its third quarter after two years of no growth, following new Chief Executive Steve Easterbrook's turnaround plan that included cutting down on menu items, improving delivery times and refranchizing more restaurants.

"In a sign that its turnaround efforts are paying dividends McDonald's latest results show continued progress," Neil Saunders, chief executive of research firm Conlumino, wrote in a note.

Sales at McDonald's U.S. restaurants open at least 13 months rose 5.7%, handily beating the average estimate of 2.7%.

"As we enter 2016, we expect continued positive top-line momentum across all segments," said Easterbrook, who took the helm last year, in a statement on Monday.

The company does not break out China sales but said sales in its "high growth" markets, which include Russia and China, rose 3%.

McDonald's is recovering in China following a food safety scandal that broke in July 2014 and hammered sales in the country for at least a year.