I'm bumping this as I've just uploaded at
Around the Sims 3 a functional bakery shop (functional with Ani's Shop from Inventory mod) with edible cakes.
It's not full new meals with recipes and ingredients, but as it's still a bit of custom food, I'm going to explain how I did it, because it's pretty easy - and that I'd love downloading more custom food!
It's easy to do, once you have the how-to, but how many headaches I've spent on this before finding something!! I had read and re-read this thread, explored pizza, birthday cakes... lost my hair and burnt my brain.
How-to
The only thing I got working during all my attempts, was the
WA dried food.
So, I cloned a plant (the smallest topiary), and replaced its Script Class Editor found in the OBJK by the one used with the dried food (
Sims3.Gameplay.Objects.FoodObjects.DriedFoodHigh), and checked the "LiveDraggingEnabled" in ObjectTypeFlags, to be able to put it in chests and then sell it with Ani's mod.
And that's all. You get a recolorable edible object.
So, sure, it's not perfect: Snob Sims know it's based on dried food and hate it, but Natural Cook love it! It's mainly a snack your Sims will eat standing, but it's possible to have them eating on a seat, if you make them sit, then click in their inventory where there's their cake, and click on "eat".
But the nice thing is that you have 3 qualities of food available (low, medium and high). Cherry on the cake: World Adventure isn't even required! I tried in my base game, and it worked.
I hope it helps a bit. Each time, I made researches on custom food for Sims 3, I stumbled on this thread, so maybe it will help people who just want to make snacks like this.