From here.

Ingredients

• 1 banana, peeled and chopped
• 2 tbsp dark rum
• 250g/9oz vanilla ice cream
• 100ml/3½fl oz milk
• 1 tbsp caster sugar
• ½ tsp grated nutmeg
• 4 ice cubes, to serve

Method

Place all of the milkshake ingredients, except the ice cubes, into a blender and pulse until smooth. Serve in a tall glass over ice cubes.