Chinese exporters, facing an American backlash over tainted food products, are turning to an unlikely group of inspectors to help clean up their act: Jewish rabbis.

Kosher certifications by rabbis have doubled to more than 300 in China in the past two years, according to the Orthodox Union, a New York-based organization that does inspections. The group expects thousands more plants to get certified in the next few years, covering everything from spices and chemical additives to frozen berries, sliced garlic, and beef.

Chinese exporters, eager to gain access to the $11.5 billion kosher market in America, had already begun seeking the certifications before the uproar over contaminated seafood, toothpaste, and pet food began last year. Now, after a rush of recalls, the rabbis say the companies are paying for the inspections to ease growing concern among American consumers about imports from China.

“When we certify a product, consumers know there is another pair of eyes” on it, Mordechai Grunberg, an American rabbi whose seven-member team examines Chinese factories, scans company books, and even drops in for surprise inspections to ensure the biblical dietary laws are followed, said.

The surge of kosher certifications hasn’t come without hiccups. Many Chinese companies were unfamiliar with the concept: One furniture maker asked for kosher certification, drawing a polite rebuff. Another facility asked to get certified as kosher even though it was smoking eel on site, a kosher no- no. The company was turned down; it is now building a separate, kosher-only facility.