Mayor Bloomberg likes his beer cold — really cold.

Standing inside the just-expanded Brooklyn Brewery yesterday, the mayor revealed that his unorthodox approach to drinking beer requires ice.

“I actually put ice in my beer,” the mayor said. “Most people don’t.”

Hearing a gasp from the crowd, he explained: “I know. I’ve always done it. I don’t think it comes from Boston.”

Brewery President Steve Hindy was too polite to set the mayor straight on the correct way to savor his popular suds.