Place all ingredients except vanilla and cook 30 min/90ºC/speed 2/MC off.
Cook 30 min/Varoma/speed 2 using basket on top of lid to prevent spatter.
Cook 4 min/Varoma/speed 4 using basket on top of lid to prevent spatter.
Add vanilla through hole in lid and beat 1 min/speed 4/MC in.
Pour into large buttered tin and allow to cool for hours and hours and hours. Don't be tempted to refrigerate to speed it up, just let it cool on the bench! The core temperature of the fudge will definitely take hours so don't say I didn't warn you!
Cut and enjoy, (and then make another batch for everyone else!)