Here is some St Patricks day trickery for you.  How to make green beer? Well rather than using food colouring, which doesn't really work with Guinness, here is a simple and effective recipe for turning beer green.  No nasty food colouring or unnatural additives necessary.  If anyone has else has a recipe for turning Guinness green please let us all know.

Its not a cocktail it is just turning Beer Green with natural colours. and then perhaps add some spices to flavour.
(Make 2 Glasses)
100 Gram of spinach.
2 mint leves.
small green chilli

Grind above and filter it,
take any light coloured beer mix it. and it look superb green with fantastic flavor.
chilli can be excluded if you do not like it.