Mushrooms and Candy

Mushrooms (loose) seem like an interesting option for another vitamin-based food. It could fill in a gap between veggies and fruit.
Furthermore, mushrooms are fermented to produce citric acid in real life. This could be replicated to similar extent. Citric acid is notorious ingredient which could be another kind of food in the "treat" category. Maybe it could provide 0.4 Unity or something? Numbers are subject to any number of tweaks of course.
Suggested Recipes:
Fermentation Tank
Mushrooms + Water + 02 => Citric Acid
OR
Mushrooms + Water + O2 => Broth
+
Chemplant
Broth + Acid + Filtration Medium => Citric Acid
Food Processor
Citric Acid + Sugar + Fruit => Candy