How to make simple icing for cakes

Ingredients:

Butter ( at room temperature ) - 1 cup
Salt - 1 pinch
Vanilla Essence - 1 tsp
Icing Sugar - 2 cups
Milk - as per required

Method for Icing:

• Take 1 cup of butter, pinch of salt, Vanilla essence and Icing Sugar in a bowl. Mix it well till all the ingredients combines together. Adjust the consistency by adding 1 tsp - 4 or 5 tsp of milk according to your creativity. 
• If you want to write something on the cake then the icing should be thick. So you have to add less milk. If you want to pour this over the cake, then the mixture should be slightly runny. 
• If you are trying icing for the first time then try adding milk drop by drop. Otherwise it will be too runny. If it becomes runny do not get upset, refrigerate for half or one hour and then try.
• You can pour the icing over cakes and then if you want you can write in different colour. For that you can add a pinch of food colour to the icing mixture that we have prepared. 
• Pour this mixture in a zip lock plastic bag and tie the upper portion of the bag. Cut the end of the cone slightly using scissor and now you can write your own wordings on cake.