Place chocolate and milk into TM bowl.
Cook for 10 minutes at 100°C on speed 3. Scrape down sides of bowl if necessary.
Add vanilla essence and blend for 1 minute on speed 8.
Add nuts and stir through for 5 seconds on 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. Slice into squares with hot knife.