"Better than a whiskey sour, in my opinion! So refreshing! From Bon Appetit magazine. Can also be made with gin, vodka, or rum."
fresh mint leaves
lemon, quartered lengthwise
Using a cocktail muddler, or the handle of a wooden spoon, mash mint leave, lemon half, and simple syrup together in a 16 oz. mixing glass, or a cocktail shaker, 4-5 times just to release juices and oils. Add bourbon.
Transfer to an Old Fashioned glass. Fill halfway with crushed ice, stir, then mound more crushed ice on top. Garnish with more mint leaves.