Pork Price Shock on a Locked Banquet Menu
A 120-cover banquet restaurant sells a 10-course set menu at ¥288 per person with a 32% food-cost target. The menu includes Dongpo pork (180 g raw pork belly per portion), lion's head meatballs, and char siu. Pork belly cost rises from ¥28/kg to ¥42/kg in six weeks. The chef's yield on pork belly is 82%; the meatball mix uses 40% pork shoulder and 60% chicken, and shoulder rose from ¥22 to ¥31/kg. The banquet contract locks price for 14 events (1,680 covers) over the next 60 days. Current food cost is ¥96.50 per cover. Labor is 22% of revenue; overhead 18%. The owner proposes reducing Dongpo pork from 180 g to 130 g and adding more rice, without telling clients. The chef proposes replacing one pork dish with fish, but 12% of booked guests have shellfish allergies and 8% are vegetarian. The kitchen has no separate allergen line.
1. Calculate the pork-belly cost increase per portion of Dongpo pork and the new food-cost percentage. Does the menu still meet the 32% target?
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Use raw weight and yield correctly. 180 g raw pork belly at ¥28/kg costs 0.180 x 28 = ¥5.04. At ¥42/kg it costs 0.180 x 42 = ¥7.56. The increase is ¥2.52 per portion, or 50%. The 82% yield affects the served weight (180 g x 0.82 = 147.6 g) but not the purchasing cost per raw portion, so do not multiply the cost by 0.82; that would understate it. Current food cost is ¥96.50 per cover, which is already ¥96.50/¥288 = 33.5%, above the 32% target (¥92.16). Adding ¥2.52 gives ¥99.02, or 34.4% of ¥288. The menu does not meet the 32% target before or after the increase. The gap is ¥6.86 per cover after the increase (¥99.02 - ¥92.16). The locked contract means the restaurant cannot simply reprice the 1,680 covers.
2. Evaluate the owner's plan to cut Dongpo pork from 180 g to 130 g and add rice without telling guests. What alternative would you recommend?
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The cut saves 50 g raw x ¥42/kg = ¥2.10 per portion, taking the new food cost to about ¥96.92, or 33.7% of ¥288; it still misses 32% and is visible shrinkflation on a signature dish. Adding rice is cheap bulk, not value, and undisclosed changes damage trust and may breach contract descriptions. I would not do it silently. Better options: use pork belly trim and shoulder trim in the lion's head and char siu to improve yield; renegotiate with the pork supplier for a 60-day contract price; replace one pork dish with a lower-cost protein for new bookings only; and offer a clearly described supplement or alternative for the locked events. For the 8% vegetarian guests, a tofu or mushroom main must be costed separately, not treated as a free swap. For the 12% with shellfish allergy, fish is not automatically safe and a fish dish may introduce bones and allergens; choose a non-shellfish, non-fish alternative with a separate prep line. Protect the Dongpo pork portion for the contracted events and recover margin on future menus.
3. What menu-engineering and kitchen-management actions would you take over the next 60 days?
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First, recost every dish on the 10-course menu, not just pork, using current yields and supplier quotes; identify the top three cost drivers and their margin. Second, separate contracted events from new bookings: honour the contracted menu and price, and build a revised menu for dates after the 60-day lock with a 32% target and a 5% contingency for price moves. Third, reduce waste: use pork trim in meatballs and fried rice, standardize 180 g portions with a scale, and track daily yield. Fourth, manage labor: the 22% labor cost leaves little room for overtime, so move prep to quieter shifts and batch braises; do not cut food-safety monitoring to save time. Fifth, communicate: update the allergen and vegetarian matrix, brief sales staff on any dish change, and offer a written alternative rather than a surprise substitution. Finally, set a weekly review of food cost, waste and supplier prices; if pork stays above ¥42/kg, trigger the next menu change rather than waiting for the contract to expire.