You can't craft any of the items? I tested the mod a bit and it worked. I will look into it tomorrow or later today

Oh, I have crafted a fair few, before my area got a thunderstorm (lol)
Just that one item does not craft. (Fake tray of biscuits)
When I right click craft from my inventory, I get the item I chose to make (but a red error box pops up)
When I craft things via the crafting menu, the only thing (so far) that drops the error is that tray of biscuits. That's the only thing in my list that has no icon.
Maybe its because I also have sephs cooking mod?

Everything else I have made so far, crafts fine from the crafting menu, no errors.
Pizza (whole) bagel, bread, a fish...two sandwiches and a bowl of cereal are happily sitting out where I put them (tho the sarnis sometimes drop below the plate, but that's the game, not your mod)
I just thought I better mention the red error pop ups in case its something important.

I fixed the error. When converting the the item list to the recipes list some text broke. And the biscuit trays crafting recipe was faulty. Now it works. Thanks for reporting :)

I was able to make the paper mache item but unfortunately I was unable to create fake food with doughnut (rotten) and jelly doughnut (rotten). I tested with cherries which were rotten and watermelon which was rotten and I couldn't make it with those either, but I could make fake chips and fake cinnamon roll which are non perishables.

I have craft helper installed and it said that I should be able to make the recipe with the rotten doughnut but unfortunately the recipe didn't recognise any rotten items. I was hoping to place the non-rotten fake food version of the rotten doughnuts in my house. I could just drop them as is, but they look gross and it would be nice if they didn't come up in the item list. I think your mod is a really good idea.

If you need any more information, or testing with other rotten items, I am happy to try and provide it. I can also provide my modlist if that's helpful.