Step 1

Place the butter and icing sugar into the bowl of your Thermomix and mix for 2 minutes on speed 3.

Step 2

Scrape down the sides and mix for a further 1 minute on speed 3 or until the mixture is white and creamy.

Step 3

Scrape down the sides of your Thermomix bowl and add the vanilla extract, cocoa and milk before mixing for 1 minute on speed 3.