Irish Coffee

Name: Irish Coffee
Prep time: 5 min
Total time: 5 min
Cuisine: British
Ingredients: ½ cup brown sugar; ½ cup water; 1 teaspoon unsweetened cocoa powder; 1 teaspoon instant espresso powder; 1 teaspoon vanilla paste (or vanilla extract); 1 teaspoon Irish whiskey (optional); ½ ounce Irish cream syrup (or simple syrup, to taste); 1½ ounces Irish whiskey (see note); 4 ounces freshly brewed coffee (hot); 1 ounce whipped cream (or heavy cream); ¼ teaspoon cocoa powder (for garnish)