Black Rock will open in early March in the basement of 9 Christopher Street in Shoreditch where it will hold more than 250 bottles of whisky from around the world.
An 18ft, 185-year-old tree trunk will form the central point of the bar rather than a traditional bar workstation. Whisky cocktails and shorts will be served by a 'roaming' bartender who will mix and serve drinks among guests who will sit around the tree trunk.
Aske and Stephenson, who formed Fluid Movement in 2009 and are behind London bars such as Worship Street Whistling Shop said they wanted to make whisky 'more accessible to all'.
"Black Rock will seek to inspire and educate guests about whisky, removing stigma and encouraging guests to rediscover this all-too-often inaccessible spirit," they said.
Later this year the bar will also launch a concierge service offering tutored tastings, advice on whisky investments and bespoke trips to whisky regions around the world.