From @ThePieous:
The key to making a “fossil crumble” work is to shade your edges with vanilla mixed with a bit of brown food colouring before you bake it – helps to make the bones pop! Aside from that it is a very simple pie to pull off, and depending on the complexity of your design, you’ll be ready to “dig in” in no time…
I hope you enjoy this “Apple Crumble Dino Dig”. It is my very first crumble attempt – I had planned to do a “regular” dinosaur fossil, but my 5 year old begged me to do a Dry Bowser. How could I say no?