After checking for the watermark of a grumpy face whilst holding a product and finding that it is indeed a genuine #ChrisSpargo video, I read the comments that bemoaned the fact that Penguins are not legally chocolate any more, and spoke favourably of Tim-Tams.
So I checked out the Tesco (seemed appropriate) on-line shopping information.
There are pretty much the same ingredients for both products, unsurprisingly enough, and the description for Tim-Tams employs evasions like 'chocolate-flavoured' and 'chocolatey' too.
https://youtube.com/v/NoA7H7KqOQM?lc=UgxU3A2cAyhuC_Y_L6N4AaABAg



