I made this yesterday, DEFINITELY halve the quantity, mine boiled over after 7 minutes, alternately possibly cook at 100 degrees rather than Varoma. I made the full mix and I had to pour half out of the jug to be able to whip it up with the butterfly too, so next time will be making a half quantity and adding a bit of vanilla for flavour.
They did turn out nice though, very yummy and didn't last long!