These are from the infamous Avonhead Playcentre Family Cookbook from when we lived in Christchurch.
1/2 tin sweetened condensed milk
1/2 teaspoon cocoa
1 packet malt biscuits
1/2 cup brown sugar
7 Tablespoons butter
1 packet marshmallows
Melt sweetened condensed milk, brown sugar, cocoa, butter, and vanilla. Do not boil. Crush biscuits and add to all ingredients except marshmallows. Roll mixture around a marshmallow, then roll in coconut and put into fridge to chill. Wet hands during rolling process is easier. If mixture gets hard to work with, reheat a little bit.