The White Russian is not for the faint of stomach. “The cream is going to build up,” said Ted Haigh, the author of “Vintage Spirits & Forgotten Cocktails.” “If you’re drinking these all night, the sugar will build, too, and you’ll have a hell of a hangover.”…

Still, some prefer the drink precisely because it is so rich. “I’m one of those fat guys that guzzle milk by the gallon,” said Steve Barber, 28, an antique motorcycle restorer from Saugerties, New York, who was attending his first Lebowski Fest and came dressed in a flak vest like the Dude’s Vietnam veteran buddy, Walter. Unlike a lot of Lebowski fans, Barber has a taste for the drink that predates his viewing of the movie. Several years ago, he said, he used to mix himself a White Russian every day for breakfast: “I called it the ‘Big Boy Milkshake.’ “