Portion errors silently drain profits from every kitchen. Oversized portions cost hundreds of euros monthly without detection. These seven mistakes destroy your margins faster than any other operational issue.
The 7 most common portion errors
⚠️ Watch out:
Every gram extra costs money. With 100 covers per day, small errors quickly add up to big amounts.
1. Oversized meat portions
This tops the list every time. You calculate with 200 grams of steak, but your chef serves 250 grams.
💡 Example:
Steak €24/kg, 50 grams extra per portion:
- Extra cost per plate: €1.20
- At 100 covers/week: €120
- Per year: €6,240
Just from 50 grams extra meat!
2. Uncontrolled garnishes
Sauces, olive oil, herb butter - nobody measures these, everyone goes by instinct. That instinct runs expensive.
- Herb butter: 20 grams instead of 15 grams = €0.08 extra per plate
- Olive oil: 10ml instead of 5ml = €0.12 extra per plate
- Parmesan: 15 grams instead of 10 grams = €0.35 extra per plate
3. Inconsistent vegetable portions
Seasonal vegetables create the biggest headaches. One cook serves 150 grams, another dishes out 200 grams of identical vegetables. This represents one of the most common blind spots in kitchen management - the lack of standardization across different shifts and cooking staff.
💡 Example:
Asparagus in season, €8/kg:
- Standard: 120 grams (€0.96)
- Actual: 160 grams (€1.28)
- Difference per plate: €0.32
With 200 asparagus plates: €64 extra costs
4. Too much rice, pasta and potatoes
Side dishes appear cheap, but volume kills profits. Rice expands dramatically during cooking - many cooks forget this.
- Rice: 80 grams dry becomes 240 grams cooked
- Pasta: 100 grams dry becomes 220 grams cooked
- Potatoes: Massive variations between different cooks
5. Incorrect fish portioning
Fish costs serious money. An extra 20 grams per portion can spike your food cost by 2-3 percentage points.
💡 Example:
Salmon fillet €18/kg after trimming loss:
- Standard portion: 180 grams (€3.24)
- Oversized portion: 220 grams (€3.96)
- Difference: €0.72 per plate
With 150 salmon plates per week: €108 extra per week
6. Uncontrolled bread and amuses
"Free" bread and amuses aren't free at all. Guests grab multiple pieces, or you serve oversized portions thinking it doesn't matter.
- Bread per person: calculate 1.5 slices, not 3 slices
- Amuses: standardize portions completely
- Butter portions: use individual packs
7. No scale in the kitchen
The fatal flaw: relying entirely on guesswork. Without scales, consistency becomes impossible.
⚠️ Watch out:
A digital scale costs €30. You'll recover that investment in one day through accurate portioning.
What portion errors cost you
Small mistakes create massive consequences. Here's what 5% oversized portions cost at different revenue levels:
- €300,000 turnover: 5% extra = €15,000 annually lost
- €500,000 turnover: 5% extra = €25,000 annually lost
- €750,000 turnover: 5% extra = €37,500 annually lost
This money vanishes straight from profit. It's not "5% reduced profit" - it's €25,000 less profit on half-million revenue.
How you prevent portion errors
The solution requires systematic approach:
- Weigh everything for the first few weeks until it becomes automatic
- Use portion spoons for sauces and garnishes
- Train your kitchen team on standard portion sizes
- Check regularly that everyone maintains the standards
Tools like KitchenNmbrs help document exact ingredient amounts for each dish, ensuring everyone follows identical standards.
How do you check for portion errors? (step by step)
Choose your 5 best-selling dishes
Focus first on the dishes you make most often. This is where you have the most impact. Note down for each dish what the standard portion sizes should be.
Weigh everything for 1 week
Have your kitchen team weigh and record everything they actually use for 1 week. Compare this with your standard recipes. You'll be amazed at the differences.
Calculate the financial impact
Add up what the extra costs are per dish and multiply by the number of portions per week. This gives you the amount you can save through better portioning.
✨ Pro tip
Weigh your 3 most expensive proteins every Tuesday for 4 weeks straight. Meat, fish and premium ingredients typically represent 60% of food costs.
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 know if my portions are too large?
Weigh all ingredients for one week and compare against your recipes. If your food cost exceeds 35%, portions are likely oversized.
Do I have to keep weighing everything?
The first month, absolutely - after that it becomes routine. For expensive ingredients like meat and fish, continue weighing indefinitely.
What if my cooks complain about weighing?
Show them the numbers. €25,000 annual savings from 5 extra minutes per service makes the math obvious.
Which ingredients need the tightest control?
Meat, fish, cheese and nuts create the biggest impact. These contain your most expensive ingredients and show the largest portion variations.
How do I prevent portions from creeping up again?
Conduct monthly spot checks. Pick one day each month to verify everyone still follows the standards.
Should I weigh garnishes and sauces too?
Absolutely - these "small" additions add up fast. A 5ml olive oil overpour across 100 covers costs €12 daily.
📚 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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