US food giant Kraft Foods has posted a higher-than-expected net profit of $937m - or 53 cents per share - for the quarter ended 30 June, up 13 per cent from $827m in the same period a year earlier.

Net revenue jumped over 25 per cent to $12.3bn, helped by Kraft's acquisition of the UK confectioner Cadbury earlier this year. Cadbury accounted for 90 per cent of the rise in Kraft's revenues.

Kraft chairman and chief executive Irene Rosenfeld said the company delivered "strong second quarter earnings" despite the tough global economy and the weak consumer environment in many markets.

She called the results an early evidence of their future potential in combination with Cadbury and said the Cadbury business delivered solid financial results. Cadbury saw revenue growth of 7.5 per cent in the same period.

Kraft acquired the owner of brands such as Dairy Milk, Halls and Green & Black's in February in a controversial $19.5bn deal.

The company's shares rose $1.14, or 3.8 percent, to $30.80 in after-hours trading on Thursday.