i looked over the icons and i like the solid design of the "Scroll of Town Portal".
And there it was: my idea.
Some items require a recipe to get completed. And sometimes u buy a recipe cause u will get the last needed item at the secret shop etc.
So what about each recipe get it's own look and i fought about somethink like this:
Normal, empty recipe:
PS: i'm not an editing-pro, so don't judge too hard if the angle of the item doesn't fit with the recipe-icon-angle =)