Old Fashioned
Sugar, bitters and whiskey, stirred over one big cube of ice. There is nowhere to hide in three ingredients, so use whiskey you would drink on its own — and stir it long enough, because the water the ice gives up is part of the recipe, not a mistake.
At a glance
Ingredients and method are in the app
Kitchen Pantri holds the full ingredient list and step-by-step method for Old Fashioned, checks it against what is already in your pantry, and adds anything missing to your shopping list. The app is free to use; you set up a Pantri account when you first open it.