The Gin Old Fashioned

Hang on to your shirts, this gin cocktail is potent.

Make this one in your rocks glass. For tradition's sake, use a thick and heavy rocks glass.
Pop your sugar cube into the glass, top with your bitters, and smash away. You can add a tiny amount of water to make this go faster.
Add about half of your gin and stir until the sugar is gone.
Fill your glass with ice. It's usually best to use one large square or circle of ice, otherwise, it melts too quickly and waters things down.
Pour in your remaining gin.
Garnish with an orange slice in the glass if you like. Or rub some orange peel on the rim and garnish with that.
You can also garnish with a Luxardo Cherry, which I dare say are quite easy to make and also delicious. Or drop that one in your drink, too.