Beyond the spirits and bitters, you'll need an Old Fashioned glass, a mixing glass, a bar spoon, a muddle, and a jigger for measuring liquids. This specific recipe uses a sugar cube, so simple syrup isn't necessary for this version, but it is a common alternative if you prefer not to muddle.

Yes, 25 minutes is a reasonable estimate for beginners, especially when gathering ingredients and getting familiar with the process. The most time-consuming parts might be thoroughly chilling your glass and cocktail mix, and patiently muddling the sugar cube until it's fully dissolved without over-muddling.

Always handle glassware carefully to avoid chips or breaks, especially when muddling. When enjoying the cocktail, remember to consume alcohol responsibly and be aware of its potency. Ensure your workspace is stable and clear of clutter to prevent accidents.

Common mistakes include over-muddling the sugar (which can release bitter notes from the peel), using too much absinthe for the rinse, or not chilling the cocktail sufficiently. To avoid these, muddle gently, use just a small amount of absinthe to coat the glass, and stir the whiskey vigorously with plenty of ice until it's very cold.