Traditionally, light color beer is most preferred to create the green effect as well. Darker beer also can select but you can get a little darker green. It depends on satisfaction of each beer drinkers.
- Recommended Light Beer or a Guinness Beer (light colored beers will display the green color better)
- Green Food Coloring
Place 2 to 3 drops of green food coloring in the clear glass of Light Beer or Guinness Beer. Pour beer into a glass slowly. Wait for few seconds, the color mixing diluted with beer.