Fill a rocks glass with ice (I used one large ice cube). Add Scotch, Drambuie, and bitters (optional).
Stir thoroughly and serve with a lemon peel garnish.
Notes
Blended Scotch - Using a single malt Scotch certainly won’t ruin this recipe, but a blended Scotch gets the job done and is the recommended option.
Play with the ratio - Try equal parts one ounce Drambuie and one ounce Scotch for a slightly sweeter drink. The original recipe calls for a one-to-one ratio, while more modern versions are a bit dryer.
Use an oversized iced cube - Giant ice cubes melt slower and are perfect for this recipe.
Garnish thoughtfully - Use a lemon peel and squeeze the lemon peel gently over the drink to express subtle lemon oils.