The Cocktail Glass
If you have prepared a cocktail before, then you must be familiar that the first thing you do is allow the cocktail glass to chill. Put the glass inside the freezer for about an hour before using it.
Mixing the Ingredients
Put all the ingredients together in a mixing glass including grenadine, tamarind syrup and sugar - except for the grapefruit juice - and stir for about 35 seconds.
Shifting rum into Cocktail Glass
Bring the cocktail glass out of the freezer and put some crushed ice in it. After that, transfer the rum from the mixing glass and again shake and stir for some time.
The grapefruit topping
Do not forget that you have to add a grapefruit as the topping of your cocktail. To have the cocktail ready, pour the grapefruit juice over the above prepared rum but do not mix this time.
The final touch
You may be surprised that the cocktail is still not ready for serving. Put the raspberries on top of the cocktail as a final touch before serving.