Line a 23cm/9in square baking tin with baking paper. To make the base, put the malted milk balls in a bag or food processor, then either bash or blend to a breadcrumb-like consistency. Transfer to ...
Finally, mix in the vanilla. The mixture should be very light and fluffy. Place the malted milk balls in the sealable freezer bag and close. Knock the malted milk balls with a rolling pin to just ...