mmmmm....just made this and love the end result!!! So as I was used to making it differently with different products in the US I have had to adapt my Australian version...

1 1/2 cups dark chocolate
2 cups marshmellows chopped (better to just have the white ones!)
2/3 cup evaporated milk
1 1/2 cup caster sugar
2 tblsp butter
1 tsp vanilla
1/2 cup chopped walnuts (if so inclined...)

put butter, sugar & evap milk in large pan and cook over low heat until melted, then increase heat to medium & boil stirring continuously for 4-5 minutes... take off heat & add in chocolate, marshmellows & walnuts mixing for around a minute or until everythings melted & smooth. Put into 8in square tin that has been buttered beforehand....

=P~

btw...this is a cheating recipe but I find it tastes really good...so doesn't matter to me lol!!! The other thing is you have to stir constantly for the 4-5 minutes otherwise it burns easily, so if you find it starts to burn, lower the heat or take it off for a second & then go back on....
ALSO...I'm allergic to nuts so I leave them out of all my recipes and they still taste great, but I add them in the recipe so everyone can know you can use them too!!

This one is a mix of a few different ones I've tried over the past two years, and is by FAR my fav!!!