Diageo’s Scotch whiskey brand Johnnie Walker has released a fifth edition of the John Walker & Sons Private Collection.

Called 28 Year Old Midnight Blend, the beverage was produced using whiskies that were aged for a minimum of 28 years and features layers of butterscotch, caramel and toffee.

Johnnie Walker’s master blender Jim Beveridge said: “Whiskies aged for 28 years are rare and very special. In our search to find the flavours and characteristics necessary for a rich, indulgent Scotch like Midnight Blend, we were very lucky to have access to some of the most mature reserves drawn from the four corners of Scotland.

“We were very lucky to have access to some of the most mature reserves drawn from the four corners of Scotland.”

“Each individual malt and grain used in the final whisky adds layers of flavour to the 28 Year Old Midnight Blend, leaving hints of fruit, sweet and spice, and making it a wonderful final addition to the Private Collection.”

Beveridge worked on the project with blender Craig Wallace. Together they sampled various single malt and grain whiskies for the new Scotch blend.

Johnnie Walker first launched its John Walker & Sons Private Collection in 2014. It featured small-batch and limited-release products.

The company has created 3,888 bottles of Midnight Blend, with an alcohol-by-volume (ABV) of 42.8%. The limited-edition blend is now available at select locations with a recommended retail price (RRP) of $750 per bottle.