Place chocolate and milk into TM bowl.
Cook for 20 min/100°C/speed 3. Scrape down sides of bowl if necessary.
Add vanilla essence and blend for 2 min/speed 8.
Add nuts and stir through for 5 sec/Reverse/speed 4.
Tip into lined 18cm square pan. Make sure the lining comes up higher than the edge of the pan for easy removal.
Refrigerate until set. This will probably take around 24 hours. Slice into squares with hot knife.