Ingredients
Icing sugar: 1cup
Powdered milk(dano): 1cup
Cornflour: 1tsp
Baking soda: 1/4 tsp
Melted butter: 1 tbsp
Warm water: 1 cup
Method
Mix everything together and lastly add water little by little in a bowl.
Then pour the content in a sauce pan or small pot and cook on a low heat. You keep stirring it until it thickens a bit.
Then bring down, as it is cooling,it is thickening too.
You can store in the fridge in an airtight container.