Step 1

Preheat oven to 160 degrees celsius (fan-forced).

Step 2

Grease and line an 20cm square baking tin with baking paper.

Step 3

Place the butter (cubed), caster sugar and cocoa into your Thermomix bowl and cook for 3 minutes, 65 degrees speed If the butter hasn’t quite melted, cook for a further 1 minute, 65 degrees, speed 2.

Step 4

Add the vanilla extract, eggs and plain flour and mix for 10 seconds on speed 4 to combine

Step 5

Scrape down the sides of your bowl and mix for a further 10 seconds on speed 4.

Step 6

Pour into the prepared tin and bake for 30 - 35 minutes or until a skewer inserted into the middle comes out clean.