Update to this post from last week.

Earlier this evening I was at my local Woollies again and walked past the cakes. Took this photo.

Still the black chocolate icing instead of the white as shown on their website, and which Coles still sells.

I also verified on the Woollies website that the cakes have indeed been subject to shrinkflation. This out of stock cake is listed at 600 g. While the one that’s currently available for sale tries to hide its total weight on the live website (for me it’s just called “Woolworths Cake Chocolate Mud Each”) but displays it on the archived version (and it can be calculated from serving size × serving count on the live site anyway). It’s now only 584 g.

I may be back at a later date after I scout out some other stores to report further findings…