The hip-hop star turned Oscar-nominated actor turned 45 on Sunday and to mark the occasion his brother Paul – who is a chef at the family’s Wahlburgers restaurant chain – has invented a bourbon-laced birthday milkshake.

The Wahlburgers’ Bourbon Chocolate Birthday Frappé contains coffee ice cream, chocolate ice cream, Bulleit bourbon and heavy cream. Topped with chocolate syrup and crumbles of chocolate Turtle – an American brand that’s apparently one of Marky Mark’s favourites – it’s basically a sugar-overload in a cup. With tastes like these, it’s a wonder the star of The Fighter can maintain his somewhat terrifying physique at all.

“As kids, birthdays always included cake and a big slab of Neapolitan ice cream sliced into nine pieces,” Paul told People magazine. “Mark always went for the chocolate.”

“In honor of Mark’s birthday, I wanted to create a frappé – that’s what we call milkshakes in Boston – with some of Mark’s favorites from growing up mixed with favorites from his adulthood.”

That would explain the bourbon, then.

Wahlburgers launched its first restaurant in Boston in 2011 and has since expanded to six other locations throughout the US. The chain hopes to open hundreds of new stores over the next five years, including five in Canada and a whopping 20 in the Middle East. (There is no word yet on an Australian off-shoot.)

According to the chain’s website, Mark’s favourite menu item is the Thanksgiving Day Sandwich – a fresh-ground turkey burger with stuffing, mayonnaise, orange-cranberry sauce and roasted butternut pumpkin – while Donnie (of New Kids on the Block fame) goes in for the BBQ bacon burger, which comes with fresh jalapeños, barbecue sauce and an avocado spread.

While we think the Wahlburgers’ pun-based moniker is nothing short of brilliant, the actor himself himself was originally against it.

“Once [Paul] mentioned the idea of Wahlburgers, I said, ‘Are you out of your mind?’” he told Adweek earlier this year. “I spent 20-some-odd years building my brand … I said, ‘There’s no way. Call it Paul’s Place, whatever you want. I’ll fund it for you, but this is not going to happen.'”

We’re glad he had a change of heart.