Celebrity chef BFFs Anthony Bourdain and Eric Ripert are a fascinating pair. They travel together, cook together, and drink an astonishing amount of alcohol together. Bourdain is a loud, opinionated TV host and writer with a habit of offending somebody every other week or so. Ripert has three Michelin stars and is a master craftsman who is widely regarded as one of the best chefs in the world.

They sound like they'd go together like oil and water, but it's more like oil and really good vinegar. When they team up, good things happen. And, like the time Bourdain took Ripert to Hooters, those things are usually a little wild, over-the-top indulgent, and great fun.

Now Bourdain and Ripert have teamed up to create a swanky new chocolate bar for Williams Sonoma, and it's every bit as opulent as you'd expect. The duo had previously co-created a bar called "Good & Evil," playing off the idea that Ripert is the good one and Bourdain is the evil one. This new collaboration continues the tradition with a bar called "Salt & Sin."

"Celebrate the season of naughty and nice with the festive flavors of a dark-chocolate bar inspired by the friendship of chef Eric Ripert and culinary guru Anthony Bourdain," says the Williams Sonoma website, which says it combines the pleasures of good food with the "heavenly evil of pure indulgence."

According to The Daily Meal, the chefs designed the new creation with chocolatier Christopher Curtin and Pennsylvania's Éclat Chocolate. It is 72 percent cacao and made with organic, fair-trade beans, with Himalayan sea salt and "complex notes of orange and fennel."

The bar is only available online from Williams Sonoma. A 2.6-ounce bar costs $12.95, but it is virtually guaranteed to impress anybody on your list who is a die-hard chocolate connoisseur, or a fan of Anthony Bourdain, Eric Ripert, and their wild culinary bromance.