To make the icing, beat the butter in a large bowl and beat with a hand-held electric mixer or use stand mixer. Beat for 1 minute, gradually add large spoonfuls of icing sugar and continue to beat on low until all the icing sugar has been incorporated. Add the passionfruit and mix with a spoon until combined.

Use icing for yo-yo’s, slice, on butter cakes, scones, muffins and more!