Most restaurant owners don't realize they're bleeding money through oversized portions until it's too late. Your food costs creep up month after month, but you can't pinpoint why. The culprit often hides in plain sight - portions that grew gradually without anyone noticing.
Warning signs your portions exceed standards
Your portions likely exceed targets if these patterns emerge in your financials:
- Food cost exceeds 35% on main courses
- Plates return completely empty - customers struggle to finish
- Ingredient usage outpaces covers despite consistent customer volume
- Food costs climb while supplier prices remain stable
💡 Example:
You price a steak at €32.00 (incl. 9% VAT). Selling price excl. VAT: €29.36
- Steak 250g at €24/kg: €6.00
- Sides and sauce: €2.50
- Total ingredients: €8.50
Food cost: (€8.50 / €29.36) × 100 = 29.0%
That appears healthy. But what happens if your chef consistently serves 300g steaks instead of 250g?
💡 With 300g steak:
- Steak 300g at €24/kg: €7.20
- Sides and sauce: €2.50
- Total ingredients: €9.70
Food cost: (€9.70 / €29.36) × 100 = 33.0%
That extra 50g meat pushes your food cost from 29% to 33%. You're losing €1.20 per steak - a pattern we see repeatedly in restaurant financials where portion control slips.
Measure portion weights systematically
Most kitchens lack standardized portion weights. One guest receives 200g, another gets 280g. This inconsistency shows up as erratic food costs.
- Weigh 10 portions of your top-selling dish
- Calculate the average - that's your real portion size
- Compare against your recipe - spot the variance
- Calculate the financial impact on your food cost
💡 Example weighing:
10 pasta carbonara portions measured:
- Smallest portion: 320g
- Largest portion: 420g
- Average: 370g
- Recipe specification: 300g
You're serving 23% more pasta than intended!
Calculate the financial damage
Every excess gram erodes profit. Here's how to quantify what oversized portions actually cost:
💡 Impact calculation:
Pasta carbonara - 70g excess per portion:
- Pasta price: €3.50/kg = €0.0035/gram
- Excess cost: 70g × €0.0035 = €0.25 per portion
- Weekly sales: 80 portions
- Weekly excess cost: €0.25 × 80 = €20
Annual impact: €20 × 52 = €1,040 on pasta alone!
That's just the pasta. Factor in cheese, cream, bacon and seasonings, and you're easily hemorrhaging €2,000+ annually on one dish.
Benchmark against competitors
Visit comparable restaurants in your market. Observe portion sizes and compare them to yours.
- Are your portions significantly larger? You can likely reduce them
- Similar size but you charge more? Review your food cost structure
- Your portions smaller at same price? You're positioned well
⚠️ Note:
Reduce portions incrementally. Dropping from 300g to 250g overnight will trigger customer complaints. Use 25g reductions over several months.
Tools for portion management
A food cost calculator helps you establish controls for each dish:
- Precise portion weights per ingredient
- Real-time food cost calculations with every modification
- Cost comparisons between different portion sizes
- Annual profit impact of every gram variation
You'll instantly see how a 250g versus 300g portion affects your bottom line, without manual calculations.
How do you recognize oversized portions? (step by step)
Check your food cost per dish
Calculate the food cost of your 5 best-selling dishes. Anything above 35% is suspicious. Include all ingredients, including garnish and sauces.
Weigh 10 portions of the same dish
Have your chef prepare 10 portions as usual. Weigh them all and calculate the average. Compare this with your recipe.
Calculate the financial impact
Work out what each gram difference costs per portion. Multiply by number of portions per week and then by 52 for the annual effect.
✨ Pro tip
Audit your portions during Friday dinner rush over 3 consecutive weeks. Portions typically inflate by 15-25% during high-pressure service periods compared to slower shifts.
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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
What constitutes a healthy food cost for main courses?
Most restaurants should target 28% to 35% food cost. Anything above 35% makes it challenging to maintain adequate profit margins.
How much portion variation is acceptable between plates?
A 10-15% difference between portions is typical. Variations exceeding 20% signal poor kitchen standardization and require immediate attention.
Will customers notice gradual portion reductions?
Gradual reductions of 25g over several months typically go unnoticed. Maintain consistent presentation and plating to avoid detection.
Should I include garnishes when monitoring portion control?
Absolutely include garnishes, sauces, oils and decorative elements. These 'minor' ingredients often comprise 20-30% of total food cost.
How frequently should I audit portion weights?
Monitor your top-selling dishes monthly at minimum. Increase frequency during staff changes or seasonal menu transitions.
What's the best time of day to conduct portion weight audits?
Audit during peak service hours when kitchen pressure is highest. Portions tend to grow larger when staff rush during busy periods.
📚 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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