The monstrosity will be available from Black Tap branches in Soho and Stratford on June 9 for a “limited time only”, believed to be a month. Those who want to indulge even more can ask for a “Guinness CrazyShake”, which is the same drink but adds a whole slice of Guinness cake and a chocolate brownie to the equation.
Guinness milkshake, anyone? A London bar will be serving them for one day only
