This is exactly the kind of problem that deserves a smarter solution, not just a more complex spreadsheet. The request from a professional kitchen veteran to build an Excel tool for portion planning is admirably practical, but it also reveals a deeper tension: the desire to handle real-world variables, yield, waste, cooking loss, changing menus, while keeping the tool simple enough for busy kitchen staff. That tension is not a design flaw; it is a signal that the tool itself is the wrong container for the ambition.
Traditional spreadsheets force users to choose between flexibility and ease of use. Every variable you add to account for seasonal ingredients or different portion sizes makes the sheet harder to maintain. Every attempt to simplify the interface strips away the robustness needed for production planning. The person who posted this knows kitchens. They know that a cook with a timer in one hand and a knife in the other does not have the mental bandwidth to navigate nested formulas and hidden sheets. Yet the complexity of their goal, adjusting recipes, estimating raw ingredients, tracking cooking loss, demands a system that adapts without breaking.
What this really calls for is an AI-native approach. Imagine a calculator that learns from your kitchen's actual yield data instead of requiring you to pre-enter every waste percentage. A tool that watches how you adjust recipes and begins to anticipate what you need for next week's menu, based on past patterns and seasonal availability. The structure would not be a rigid grid of cells but a conversational interface that asks, "How many servings of the lentil stew do you need tomorrow?" and responds with a precise ingredient list, adjusted for your specific ovens, pans, and prep methods.
The practical meaning for anyone building this is clear: do not spend months perfecting Excel formulas that will need to be rewritten every time a supplier changes or a new recipe is added. Instead, start with the data structure, ingredients, yields, recipes, waste factors, and build a system that can interpret that data dynamically. The rigidity of traditional spreadsheets is the enemy of a busy kitchen. The future of kitchen planning is not a better spreadsheet; it is a tool that understands the kitchen itself.