Preheat oven to 190°C and line a baking tray with paper. Set aside.
Place butter, vanilla and salt into Thermomix bowl and melt 4 min/70℃/speed 1. Add oats and mix 4 sec/speed 4. Cool slightly.
In separate bowl beat egg with sugar with a balloon whisk until well blended.
Add Brew Choc granules, flour and baking powder and combine.
Add a little egg mixture at a time to the oat mixture and combine gently by hand.
Spoon mixture onto prepared baking tray with plenty of room between as they will spread. You should only cook about 6 at a time.
Bake 7-9 minutes until golden and just darkening around the edges.
Cool on cooling rack. Drizzle with melted dark chocolate.