Step 1

Preheat your oven to 160 degrees and line two tray with baking paper.

Step 2

Melt 125g of milk chocolate in the microwave and set aside until needed.

Step 3

Place the butter and brown sugar into your Thermomix bowl and mix for 30 seconds on speed 6.

Step 4

Add the egg and vanilla extract and mix for 20 seconds on speed 4 to combine.

Step 5

Add the flour, cocoa, bicarbonate of soda and the melted milk chocolate and mix for 20 seconds on speed 4 or until combined. Stop after 10 seconds to scrape down the sides.

Step 6

Add the chopped milk chocolate and white chocolate chips and mix for 20 seconds on speed 3 REVERSE or until combined.

Step 7

Scoop up tablespoon sized balls of the cookie mixture and place onto your prepared baking trays. Flatten the surface of the biscuits slightly and place in the oven to bake for 12 - 15 minutes.

Step 8

Carefully remove the cookies from the oven and let them cool on the baking tray for 10 minutes before carefully transferring them to a wire rack to cool completely.