2 ounces light rum
1/2-ounce banana liqueur
2 tablespoons lime juice
1/2 small banana, peeled and coarsely chopped
1/2 cup crushed ice
Maraschino cherry for garnish
Combine all ingredients in an electric blender and blend at high speed until smooth.
Pour into a chilled cocktail glass and garnish with a maraschino cherry.