US doughnut retailer Krispy Kreme Doughnuts has posted a 47% rise in quarterly earnings as new stores boosted sales. Krispy Kreme posted profit of US$13.1m, or 22 cent a share, for the first quarter to 4 May, compared with $8.9m, or 15 cents a share, a year earlier. Earnings included $500,000 from an overestimation of the cost of an earlier arbitration award against the company.