Cost Creep on the Panna Cotta
You run the pastry program for a 140-cover restaurant. The vanilla panna cotta sells about 900 portions a month at a menu price of $9.00. Your costing sheet, built six months ago, lists a food cost of $2.10 per portion (23.3%). This month's invoices show: cream up from $4.20/L to $5.10/L (the recipe uses 0.25 L per portion), gelatin up 18%, sugar up 12%, and vanilla bean up from $6.00 to $11.00 each (the recipe uses 1/6 of a bean per portion). The panna cotta also carries a 3% waste allowance for failed sets. Your target food cost is 30%. The chef wants to know whether the dessert is still profitable and what to do before the next menu print.
1. Recalculate the current food cost per portion and the food cost percentage, showing the main drivers.
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Rebuild the cost from the drivers given (using the old sheet as baseline):
- Cream: 0.25 L × $5.10 = $1.275 (was 0.25 × $4.20 = $1.05; +$0.225).
- Gelatin, sugar: up 18% and 12% respectively - modest absolute increases; estimate their combined old contribution from the $2.10 baseline and apply the increases. If gelatin+sugar were, say, ~$0.30 of the old $2.10, the increase is small (a few cents).
- Vanilla: 1/6 bean × $11.00 = $1.833 (was 1/6 × $6.00 = $1.00; +$0.833). This is the dominant driver.
Approximate new cost before waste: old $2.10 − old cream $1.05 − old vanilla $1.00 + new cream $1.275 + new vanilla $1.833 + small gelatin/sugar increase ≈ $3.20–$3.25 per portion.
Add 3% waste: ×1.03 ≈ $3.30–$3.35 per portion.
Food cost %: $3.32 ÷ $9.00 ≈ ~37%, up from 23.3% - well over the 30% target.
Main drivers: vanilla bean price nearly doubled (biggest single contributor, ~$0.83/portion) and cream (+$0.23/portion). Gelatin and sugar are minor.
2. The chef wants to keep the $9.00 price. What options do you present, with the cost impact of each?
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Present options ranked by impact and risk:
- Reformulate the vanilla. Switch from whole bean to a high-quality vanilla extract or paste at a controlled dosage, or split the bean and use the scraped pod in the base to extract more. A paste at a fraction of the per-portion cost could cut ~$0.50–$0.80/portion. Impact: brings cost back near target; flavor risk if the extract is poor - test it.
- Trim waste. 3% failed sets at ~$3.30/portion is ~$0.10/portion; tightening set control (probe, bath, chill) can recover most of it. Small but free.
- Portion/recipe efficiency. Confirm the 0.25 L cream is necessary; a slightly smaller portion or a tighter set may reduce cost without perceived value loss. Moderate.
- Price adjustment. A $1.00 increase to $10.00 drops the % to ~33%; $10.50 to ~31.6%. Direct but guest-facing.
- Menu engineering. If the panna cotta is a low-margin anchor, pair it or reposition it; or run it as a seasonal item rather than a permanent line.
Recommendation: Reformulate vanilla (test first), tighten waste, and hold the $9.00 price if the reformulation lands near 30%; if not, a modest price increase to $9.50–$10.00 closes the gap.
3. What costing and control practices would prevent this kind of silent margin erosion in the future?
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- Living cost sheets. Recalculate plate costs whenever a key invoice moves more than a set threshold (e.g., 10%), not on a fixed six-month cycle.
- Track the big movers. Vanilla, cream, chocolate, and butter are volatile; flag them for monthly review.
- Standardized recipes with yields. Lock portion sizes and yields so cost per portion is real, not estimated.
- Waste tracking. Log failed sets and other waste by cause so the 3% allowance is measured, not assumed.
- Menu engineering review. Compare food cost % and contribution margin across desserts each period; act before the print deadline.
- Supplier and spec discipline. Know the spec and price of what you buy; get alternatives quoted when a commodity spikes.