Add the rum, vermouth, orange curacao, and grenadine. Stir together until well chilled, about 30 - 60 seconds.
Strain the drink into a chilled cocktail glass and add any desired garnish before enjoying it immediately.
Notes
Measure accurately: Use a jigger or a measuring cup to measure your ingredients accurately. A precise measurement can make a big difference in the balance and flavor of your cocktail.Adjust the sweetness: If you prefer a sweeter cocktail, you can add a dash of simple syrup, maple syrup, or honey.High-quality ingredients: Choosing good-quality ingredients will significantly improve your El Presidente Cocktail. Like most classic cocktails, each ingredient that is added should be chosen carefully because it is a simple drink and each element stands out and plays an important role.Perfect your balance: It is easy to adjust this cocktail to your exact preferences. If you want more body, try a richly flavored aged rum. If you want to sweeten the vermouth, try a red style of vermouth. And if you find the cocktail too orange-heavy, lessen the amount of curaçao you add.