Preheat oven as per directions on the box.
Put the liners in the muffin pan. Set aside.
Following the directions add ingredients.
Mix all ingredients as instructed.
Divide the batter into two bowls
Mix in a few drops of green food coloring into one bowl.
Alternate between the green batter and the plain one, scoop about 1 TBSP of batter each into the cupcake liners until ⅔ full.
Put in the oven and bake for 22 minutes.
Check for doneness. ( Insert a toothpick into the center of a cupcake, it should come out clean.)
If they are not done, check again every three minutes until they are done.
Remove from oven and allow to cool.Transfer to a cooling rack and allow to cool completely before frosting.