Beat the butter in a large bowl until soft. Add half of the icing sugar and beat until smooth. Add the remaining icing sugar and one tablespoon of the milk and vanilla extract and beat the mixture ...
Put the butter, milk and any flavouring in a mixing bowl. Sift in the icing sugar a little at a time and beat well between each addition until it has all been incorporated and the mixture is light ...
Sift in the icing sugar, then work it into the butter, starting slowly at first, then beating more vigorously once all the sugar is combined. Add the milk and the vanilla, then beat until creamy ...