Here's what most restaurant owners don't realize: they're bleeding money through their bestsellers. Your top five dishes control 80% of your profitability. But a simple 15-minute weekly routine can stop those silent profit leaks.
Why your bestsellers matter so much
Those top five dishes? They're generating 60-70% of your food revenue. When one suddenly tanks your margin — supplier price hikes, oversized portions — you'll hemorrhage hundreds monthly without realizing it. I've seen this mistake cost the average restaurant EUR 200-400 per month, and owners only catch it during their quarterly reviews.
💡 Example:
Your steak sells 50 times per week for €32.00 (excl. VAT €29.36). Ingredient costs rise from €9.50 to €11.00.
- Old food cost: 32.4%
- New food cost: 37.5%
- Difference per portion: €1.50
Loss per year: €1.50 × 50 × 52 = €3,900
Which dishes do you check?
Pull up last week's POS data or receipt stack. Count portions sold, not revenue. That €45 wagyu might look impressive on paper, but if you only moved three portions, it's not driving your profits.
- Top-selling main course
- Most popular protein dish
- Bestselling vegetarian option
- Leading appetizer
- Star dessert
Volume beats value here. Focus on what's flying out of your kitchen most frequently.
The 15-minute check routine
Pick Tuesday mornings during the lull. You'll need your supplier invoices, recipes for those five dishes, and either a calculator or tools like KitchenNmbrs.
- Recent invoices from primary suppliers
- Standardized recipes for your top five
- Calculator or food cost app
⚠️ Watch out:
Don't skip the small stuff. That truffle aioli drizzle? €0.80 per spoonful. Microgreens, specialty oils, finishing salts — they add up fast and often get overlooked.
What do you do if the margin is too low?
Food cost creeping above 35%? You've got three moves:
- Bump the price: Best option for crowd favorites
- Trim portions: 20g less protein saves €1-2 per plate
- Swap ingredients: New supplier or comparable substitute
💡 Example adjustment:
Your carbonara hits 37% food cost. Time to act:
- Price increase €18.50 to €19.50: drops to 33.1%
- Pasta portion 160g to 140g: becomes 34.2%
- Switch pancetta €24/kg to €19/kg: lands at 33.8%
How do you keep this up?
Monday mornings, coffee in hand, fifteen minutes on your bestsellers. Set that phone reminder now.
After three weeks, you'll know these numbers instinctively. Any unusual spike will jump out immediately.
Food cost calculators automate the math, but the principle remains: track your top five weekly.
How do you check your bestsellers? (step by step)
Identify your top 5 dishes
Grab your POS data from last week. Count which dishes sold the most, not which generated the most revenue. Note the quantities per dish.
Calculate current ingredient costs
Get the recipes for these five dishes. Add up all ingredient costs, including garnish, sauces, and oil. Use your most recent purchase prices from invoices.
Check the food cost percentage
Divide ingredient costs by your selling price excl. VAT and multiply by 100. If it's above 35%, you need to take action: raise the price, adjust the portion, or buy cheaper.
✨ Pro tip
Photograph your ideal portion sizes and post them at each station. Your kitchen team gets visual standards, and portions stay consistent across every shift and cook.
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 my bestsellers?
Weekly prevents small problems from becoming expensive disasters. Suppliers adjust prices constantly, and a two-week delay can cost you hundreds in missed margin opportunities.
What if I don't have a POS system that tracks quantities?
Keep a tally sheet in the kitchen for one week. Mark down every dish as it goes out. After seven days, you'll have your bestseller rankings and can start your weekly routine.
Should I also check beverages on margin?
Beverages maintain stable pricing and higher margins around 60-80%. Your food bestsellers fluctuate more and impact profits harder, so prioritize those first.
What's an acceptable food cost for main courses?
Target 28-35% for mains, with appetizers and desserts running slightly higher up to 40%. Guests show less price sensitivity on starters and sweets.
How do I prevent my chef from making portions too generous?
Standard portion tools and random weighing work wonders. A kitchen scale and clear communication about profit impact usually solve oversizing issues quickly.
What's the fastest way to calculate food cost percentages?
Divide your total ingredient cost by your menu price, then multiply by 100. A €8 ingredient cost on a €25 dish equals 32% food cost.
📚 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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