Earn Bread through normal play, quests and achievements
The official description names three Bread sources: playing Duck Duck games, completing quests and completing achievements. Pick a visible item goal, track your own results and use the calculator without assuming an unofficial rate.
Bread connects the round loop to the cosmetic loop. You play the party game, complete tasks and then spend Bread on accessories or bundles for a custom duck. That makes the best early Bread plan goal-based: decide what you are saving for before judging whether a session was productive.
No official Bread-per-round table or shop-price catalog was available during this check. A precise universal farm rate would therefore be misleading. Your current quests, events and performance can change what you earn. The planner accepts your own observed estimate for exactly this reason.