My apologies! There's a ton of items and scenes to keep track of - so sometimes I miss things like this. I added a choice to craft it at the mill, and sell flour at the grocer.
If your having trouble keeping track of that it might help to make proper internal documentation and flowcharts on how to reach various end products or goals and which steps have been implemented (and to what degree). It's not particularly fun work but with how many recipes you are planning on adding, it might be necessary.
...On a related note, recipes that have multiple variants do not show up as craftable until you select the correct variant, which although hardly critical at this early stage does make looking out for new recipes to try a bit exhausting.