The Spicy Margarita succeeds where so many of its siblings seem to fail. That is to say, it refocuses the classic tequila cocktail without losing what’s essential to its success: that timeless blend of sweet, sour and earthy flavors. The key is to use fresh jalapeño. Two muddled coins, with seeds removed, yields a conservatively spicy drink. But for a spicier Spicy Margarita, throw in a third coin. It’s the perfect cocktail to fire up your summer.