You will need:
Butter depending on how much icing you want to make and for what.
A little bit of milk.
Food coloring or flavor- optional.
The first step is to put your room temparature butter in a hand mixer and beat it for 5-6 minutes. The reason is that the butter will become light and turn white instead of it staying yellow. It will also large a bit in size.
Slowly add the icing sugar and make sure there are no lumps. Add slowly little at a time because you will stop at a certain point for the consistency you want.
Add milk if you feel it starts to thicken up too uch and add flavor and food coloring. Blend well- Don't overblend.