When you watch videos on how to make Moscow mules, the cocktail would be presented with a sprig of mint leaves acting as a garnish only. Sure, it adds to the aesthetics but the thing is, mint is such a powerful ingredient and it should be in the cocktail, not just a mere decoration. And yes, the ginger beer may already be the “kick” factor in the drink but sometimes, you kind of get used to it and perhaps you want something a little extra, and that’s what the mint is for.