4 parts Auchentoshan 12 year
1 dash Twisted & Bitter Grapefruit & Rosemary Bitters
1 dash orange oil
1 orange rind
1 dark sugar cube
Add cube to glass, add oil and bitters into cube. Muddle till crushed, combine small amount of whiskey until totally stirred. Add ice and stir for 60 seconds.
A twist on a sure classic, orange oil is a delightful (expensive) ingredient that helps the cocktail coat the mouth.