Start by rubbing an orange peel on an Old Fashioned glass rim (and insides, for a stronger flavor).

Place the sugar cube inside the glass and top it with a few dashes of bitters.

Crush the sugar and bitters with a muddler, until it dissolves into a syrup. (If using granulated sugar, you might have to add a splash of water or club soda to dissolve it!)

Add a few large ice cubes (or one big ice sphere), pour in the bourbon and stir well.

Garnish with an orange peel (or wedge) and a maraschino cherry. Serve immediately, with a stirring rod.