Whoever named the whiskey sour gets zero points for originality. Other drinks have fancy names: The Martini, The Manhattan, The Slippery Nipple. But the whiskey sour? It sounds exactly how it tastes. What the name doesn’t convey is that there’s a balanced sweetness to make this cocktail more than just a zesty zap of citrus.
Heat a small skillet or grill pan over medium-high heat. Once it’s hot, place the lemon wheels in the pan and brown. Flip once to brown the other side. Set aside.
Fill a double old-fashioned glass with ice. Add gin. Pour in tonic. Give it a gentle stir. Garnish with a sprig of rosemary and the reserved lemon wheel.
For bonus points, after you add the gin, put a barspoon into the glass and pour the tonic down the spoon. It’s a fun party trick, and you can taste the extra playfulness.