Ingredients
140g/5oz butter, softened
280g/10oz icing sugar
1-2 tbsp milk
a few drops food colouring

Method
1. Beat the butter in a large bowl until soft. Add half the icing sugar and beat until smooth.
2. Then add the remaining icing sugar with one tablespoon of the milk.
3. Beat until creamy then add the food colouring and mix well.
4. Add extra icing sugar to thicken or a little extra milk to make more runny if necessary.