Flour connects Wheat to Cake
Flour is the bridge between Wheat production and Cake production. If you are breeding seriously, check the entire path from Wheat Seeds to Wheat, Flour, Cake, and Breeding Farm storage. A strong Flour route does not help if Honey, Milk, Eggs, or Red Berries are still being gathered by hand every few eggs.
How to size Flour production
Size Flour production around the number of breeding attempts you expect, not around a random storage target. One or two eggs need only a small batch, while passive projects and route testing need repeated Cake. Matching Flour output to the breeding plan keeps the base from overproducing one ingredient while another runs out.