Every chef I know has made this costly mistake: eyeballing portions instead of weighing them. One extra 20 grams on your ribeye doesn't sound like much, but it'll cost you €2,500 annually. Most kitchens bleed money this way without even knowing it.
Spot your margin-sensitive dishes
Different dishes have wildly different sensitivities to portion creep. Your Caesar salad can handle some variation - your wagyu beef can't. Focus on ingredients that cost more than €15 per kilogram.
💡 Example: Steak portioning
You sell steak for €32.00 (excl. VAT €29.36) with a planned portion of 200 grams:
- Beef: €24/kg = €4.80 per 200g portion
- Garnish: €1.20
- Total food cost: €6.00 = 20.4%
But if your chef gives 220 grams:
- Beef: €5.28 per portion
- New food cost: €6.48 = 22.1%
- Extra costs: €0.48 per portion
At 100 portions per week: €2,496 extra costs per year
Calculate your portion drift costs
Every dish has a different vulnerability to over-portioning. You need to quantify this so you know where to focus your energy first.
💡 Example: Salmon impact calculation
Grilled salmon fillet, purchase price €18/kg:
- Cost per gram: €0.018
- 10 grams extra per portion = €0.18
- At 80 portions per week = €748 per year
- 20 grams extra per portion = €0.36
- At 80 portions per week = €1,497 per year
Here's the math: Annual overage cost = (Extra grams × Price per gram) × Weekly portions × 52
I've seen restaurants lose €200-400 monthly just from inconsistent salmon portioning. That's a mistake that adds up fast.
Create portion tolerance zones
Not every ingredient deserves the same level of precision. Smart kitchens tier their portioning standards based on ingredient cost and volume.
- Precision zone (±5 grams): Meat, fish, foie gras, truffles
- Careful zone (±10 grams): Cheese, nuts, premium vegetables
- Standard zone (±20 grams): Pasta, rice, potatoes, basic vegetables
⚠️ Watch out:
Sauces destroy more margins than most chefs realize. That extra ladle of hollandaise or truffle cream costs more than an extra potato. Measure liquids, don't guess.
Make the numbers real for your team
Your cooks won't care about food cost percentages. But they'll understand monthly rent payments and salary costs.
💡 Example: Team briefing
"Each time we over-portion our ribeye by 20 grams, we lose €2,500 yearly. That's:
- One month's kitchen rent
- Our profit from 250 covers
- The difference between breaking even and making money"
Skip the percentages. Talk about things your team can visualize - rent, utilities, their own paychecks.
Build portioning systems that stick
Good intentions fade during busy service. You need foolproof systems that work even under pressure.
- Station scales: Every cook has a scale within arm's reach
- Visual portion guides: Photo cards showing correct portions
- Spot checks: Weigh 5 random plates each shift
- Learning-focused feedback: Treat mistakes as training opportunities
Tools like a food cost calculator help by showing real-time cost per gram, so your team sees exactly what each deviation costs.
How do you determine which dishes need exact portioning?
Calculate cost per gram of each main ingredient
Divide the purchase price per kilo by 1000. A steak at €24/kg costs €0.024 per gram. Do this for all expensive ingredients in your recipes.
Calculate the annual impact of 20 grams extra
Multiply cost per gram × 20 × portions per week × 52. This gives you the annual cost of inaccurate portioning per dish.
Rank dishes by financial impact
Create a list from high to low impact. Dishes with more than €1,000 annual impact at 20 grams extra deserve strict portion control.
Set tolerance limits per category
Critical dishes (meat, fish): ±5 grams. Important dishes (cheese, premium): ±10 grams. Normal dishes: ±20 grams. Communicate this clearly to your team.
✨ Pro tip
Track your 3 highest-volume dishes with ingredients over €20/kg for exactly 7 days. Weigh every portion and calculate the cost variance - you'll find your biggest money leaks within a week.
Calculate this yourself?
In the KitchenNmbrs app you can do this in just a few clicks. 7 days free, no credit card.
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Frequently asked questions
How do I explain to my team why exact portioning is so important?
Skip the food cost percentages - use concrete money examples instead. Tell them "20 grams extra ribeye costs us €2,500 per year - that's our monthly equipment lease." Real numbers hit harder than abstract percentages.
Which dishes have the highest priority for exact portioning?
Focus on anything costing more than €15/kg: meat, fish, premium cheeses, nuts, specialty ingredients. Calculate the annual impact of 20g over-portioning for each dish. Above €1,000 yearly impact means high priority.
What if my chef says weighing portions slows down service?
Do the math for them: 30 seconds extra weighing versus €0.50 loss per plate. At 100 daily covers, you're losing €18,250 annually to save 50 hours of weighing time. That's terrible math.
Should expensive sauces get the same portioning attention as proteins?
Absolutely - premium sauces often have higher per-gram costs than the proteins they accompany. Use measured ladles and portion cups, never free-pour expensive reductions or truffle oils.
📚 Sources consulted
- EU Verordening 852/2004 — Levensmiddelenhygiëne (2004) — Official source
- EU Verordening 853/2004 — Hygiënevoorschriften voor levensmiddelen van dierlijke oorsprong (2004) — Official source
- EU Verordening 1169/2011 — Voedselinformatie aan consumenten (2011) — Official source
- NVWA — Hygiënecode voor de horeca (2024) — Official source
- NVWA — Allergenen in voedsel (2024) — Official source
- Codex Alimentarius — International Food Standards (2024) — Official source
- FSA — Safer food, better business (HACCP) (2024) — Official source
- BVL — Lebensmittelhygiene (HACCP) (2024) — Official source
- Warenwetbesluit Bereiding en behandeling van levensmiddelen (2024) — Official source
- WHO — Foodborne diseases estimates (2024) — Official source
Food Standards Agency (FSA) — https://www.food.gov.uk
The HACCP standards shown in this application are for informational purposes only. KitchenNmbrs does not guarantee that displayed values are current or complete. Always consult the FSA or your local authority for the latest regulations.
Written by
Jeffrey Smit
Founder & CEO of KitchenNmbrs
Jeffrey Smit built KitchenNmbrs from 8 years of hands-on experience as kitchen manager at 1NUL8 Group in Rotterdam. His mission: give every restaurant owner control over food cost.
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