Your spreadsheets say 30% food cost, but your monthly P&L shows 35%. Sound familiar? The calculations look perfect, but something's bleeding money between the recipe card and the plate.
Why practice differs from your calculations
Your recipes might be spot-on in theory, but execution tells a different story. Something's leaking between planning and plating. The most common culprits:
- Portion sizes don't match: You calculate with 200g meat, but your chef gives 250g
- Extras not in the recipe: Extra butter, olive oil, garnish
- Waste during preparation: Failed dishes, too much mise-en-place
- Prices not updated: Your supplier raised prices, but you didn't update the system
- Trimming loss higher than expected: You calculated 20% loss, but it's 30%
💡 Example:
Your pasta carbonara according to calculations:
- Pasta: €0.80
- Bacon: €1.20
- Cream: €0.60
- Egg: €0.40
- Cheese: €0.90
Calculated: €3.90 (25% food cost at €15.60 excl. VAT)
But in practice your chef uses more bacon (€1.60) and extra butter (€0.30). Actual: €4.80 (31% food cost).
Step 1: Measure what actually happens
You can't fix what you don't measure. Spend one full week tracking everything that goes into each dish.
Track these details:
- Choose your 3 best-selling dishes
- Weigh ingredients before cooking (don't guess afterwards)
- Note everything added: extra salt, pepper, oil, butter
- Count waste: failed dishes, leftover mise-en-place
- Compare with your original recipe
⚠️ Note:
Track for a full week, not just one day. Busy Saturday service looks very different from quiet Tuesday lunch.
Step 2: Update your recipes with reality
Once you know what's actually happening, adjust your recipes to match reality. Don't fight the kitchen—work with it. This is the kind of thing you only learn after closing your first month at a loss: theoretical perfection rarely survives actual service.
Common adjustments:
- Portion sizes: From 200g to 220g meat
- Add missing ingredients: Olive oil, butter, spices you forgot
- Adjust trimming loss: From 20% to 25% for fish
- Waste percentage: 5-10% markup for failed dishes
💡 Example adjustment:
Original steak recipe:
- Steak: 200g × €32/kg = €6.40
- Vegetables: €1.80
- Sauce: €0.60
Reality:
- Steak: 220g × €32/kg = €7.04
- Vegetables: €1.80
- Sauce: €0.60
- Extra butter: €0.40
New total: €9.84 instead of €8.80
Step 3: Choose your strategy
Now you know the real numbers. Time to decide how to bridge the gap:
Option 1: Raise prices
- Adjust menu prices to match actual costs
- Advantage: food cost percentage returns to target
- Disadvantage: higher prices might deter customers
Option 2: Standardize portions
- Train kitchen staff to follow recipes exactly
- Use scales, measuring cups, standard spoons
- Advantage: consistency and immediate cost savings
- Disadvantage: requires ongoing discipline and training
Option 3: Adjust recipes
- Find cheaper ingredients or reduce portions
- Maintain taste while cutting costs
- Advantage: better margins without price increases
- Disadvantage: might compromise quality
Common mistakes to avoid
Mistake 1: Obsessing over perfect standardization
Some variation is natural. Focus on the dishes that move your needle most.
Mistake 2: Knee-jerk price increases
First explore smarter purchasing or waste reduction. Price hikes should be your last resort.
Mistake 3: Ignoring your team
If your chef doesn't understand why portion control matters, your efforts will fail. Show them how extra costs affect everyone's job security.
💡 Real-world example:
Restaurant De Smaak tackled this systematically:
- Week 1: Weigh and measure everything
- Week 2: Update recipes with real data
- Week 3: Train kitchen staff on new standards
- Week 4: Raise prices on two dishes by 10%
Result: Food cost dropped from 36% to 31% in one month
Preventing future gaps
Once you've closed the gap, keep it closed:
- Monthly reality checks: Verify actual food cost matches calculations
- Price updates: Update costs immediately after supplier changes
- Ongoing training: Remind staff why standardization matters
- Waste tracking: Record what gets thrown away and why
How do you close the gap between theory and practice?
Measure reality for a week
Weigh all ingredients you use for your 3 best-selling dishes. Also note extras like butter, oil, and waste. Compare this with your KitchenNmbrs recipe.
Update your recipes with actual amounts
Adjust your KitchenNmbrs recipes with the actual amounts used. Add forgotten ingredients and correct portion sizes. Calculate your new food cost.
Choose your strategy: prices, portions, or recipes
Decide whether to raise menu prices, standardize portions, or adjust recipes. Often a combination works best: standardize key dishes, adjust prices slightly.
✨ Pro tip
Track your 3 highest-volume dishes for exactly 5 days each quarter by weighing every ingredient before it hits the pan. This catches cost creep before it destroys your margins.
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 often should I check if my actual food cost matches my calculations?
Check monthly for your best-selling dishes. After supplier price changes or seasonal ingredient swaps, do it immediately. Don't wait for month-end surprises.
What if my kitchen team won't stick to standard portions?
Show them the math: every extra 20g of meat costs €500+ annually. Train with scales and measuring tools. Make it routine, not punishment.
Is it better to raise prices or reduce portion sizes?
Do both strategically. First, standardize portions to realistic sizes, then adjust prices if needed. Customers notice sudden portion cuts more than gradual price increases.
How much variance between theory and practice is acceptable?
2-3 percentage points is normal (30% becoming 32-33%). Beyond 5 percentage points means serious leakage that demands immediate action.
Should I track all dishes or focus on popular ones?
Start with your 5 best-selling dishes—they drive 80% of your food cost impact. Perfect those first, then expand to slower movers.
What's the biggest mistake restaurants make with food cost calculations?
Forgetting about cooking oils, seasonings, and garnishes. These "invisible" ingredients can add 15-20% to your actual costs without appearing in basic recipes.
How do I handle seasonal price fluctuations in my calculations?
Update your system every time invoices show price changes above 10%. Create alerts for volatile ingredients like seafood or produce that swing monthly.
📚 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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