While summer dishes like carpaccio require zero cooking energy, winter stews can rack up €4-6 in gas costs per portion. This stark difference in energy consumption creates a hidden margin squeeze that most restaurant owners never see coming. Yet these costs are just as real as your ingredient expenses.
Why winter dishes are more expensive
Winter dishes demand longer cooking times and higher energy consumption. A beef wellington sitting in the oven for 45 minutes costs €1.80 in gas, while carpaccio costs nothing. These costs won't appear on your ingredient invoice, but they'll definitely eat into your profits.
💡 Example:
Stew vs. salad - hidden costs:
- Stew: 3 hours simmering = €4.20 gas costs
- Salad: no heating = €0 energy costs
- Difference per portion: €4.20
You need to charge €4.20 more to maintain the same margin
Calculate your energy costs per dish
Most restaurant owners completely overlook energy costs in their pricing. An oven running at 180°C burns through approximately €3.60 per hour. So that 45-minute bake time? That's €2.70 added to your cost price.
Energy cost formula:
Energy costs = (Appliance power in kW × Time in hours × €0.40 per kWh)
💡 Example calculation:
Beef wellington - 45 minutes in oven:
- Oven: 9 kW × 0.75 hours × €0.40 = €2.70
- Ingredients: €12.50
- Total cost price: €15.20
At selling price €45 (excl. VAT €41.28): food cost 36.8%
Adjust your prices for the season
Plenty of restaurants stick to fixed prices all year long. But your costs aren't fixed - they fluctuate with the seasons. Winter brings higher energy bills, summer means air conditioning costs. Smart operators adjust their pricing accordingly.
- Winter specials: build energy costs into your pricing structure
- Summer menu: lower cooking costs, but factor in cooling expenses
- Seasonal ingredients: capitalize on peak season pricing
⚠️ Note:
Don't just calculate ingredient costs. A winter stew that simmers for 4 hours costs €5.60 in gas. That's often more than your vegetables cost.
Cook more efficiently in winter
You can slash energy costs by cooking smarter, not harder. Batch cooking delivers massive savings - cook large quantities at once rather than individual portions. A full oven costs exactly the same as a half-empty one. And here's a mistake that costs the average restaurant EUR 200-400 per month: not maximizing oven capacity during long cooking times.
- Batch cooking: prepare large batches, then reheat portions as needed
- Heat stacking: use residual oven heat for multiple dishes
- Smart timing: start slow-cooking dishes early, maximize equipment usage
💡 Efficiency example:
Full oven vs. half-full for 3 hours braising:
- Energy costs: €10.80 (regardless of how full)
- Full (20 portions): €0.54 per portion
- Half-full (10 portions): €1.08 per portion
Difference: €0.54 per portion savings
Track energy costs in your system
Most restaurant owners guess at energy costs. But guessing is just gambling with your margins. Measure actual consumption per appliance and build these numbers into your dish costing. Food cost calculators like KitchenNmbrs let you add energy costs directly to recipes, right alongside ingredient expenses.
How do you factor energy costs into your prices?
Measure the power of your appliances
Check the nameplate of your oven, cooktop and fryer. Note the power in kW (kilowatt). An average oven uses 9 kW, a cooktop 3 kW per burner.
Calculate costs per hour
Multiply the power by your energy rate (average €0.40 per kWh). A 9 kW oven therefore costs 9 × €0.40 = €3.60 per hour to run.
Factor in cooking time
Measure how long each dish uses energy. A stew that simmers for 3 hours on a 3 kW cooktop costs 3 × €1.20 = €3.60 in energy. Add this to your ingredient costs.
✨ Pro tip
Track your oven and stovetop usage for exactly 7 days - note every minute they're running. Calculate the total energy cost and divide by portions served. Most operators discover they're absorbing €2-4 per dish in unaccounted energy 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
Should I include energy costs in my food cost calculation?
Absolutely, especially for long-cooking dishes. A braised stew can rack up €4-6 in energy costs alone - often exceeding your vegetable costs. Ignoring these expenses means you're essentially giving away money.
How do I calculate what my oven costs per hour?
Find the power rating on your oven's nameplate (listed in kW). Multiply that by your energy rate, which runs about €0.40 per kWh. So a 9 kW oven burns €3.60 per hour.
Can I charge different prices for winter versus summer dishes?
Yes, and you should. Winter dishes consume significantly more energy to prepare. Many successful restaurants use seasonal menus with pricing that reflects actual cooking costs.
What's a reasonable energy cost percentage for winter dishes?
Treat energy costs like any other ingredient in your costing. If you normally target 30% food cost and energy adds €3, increase your price proportionally to maintain that 30% target.
How can I reduce energy costs without sacrificing food quality?
Batch cooking delivers the biggest impact. Cook large quantities simultaneously and reheat portions as needed. A full oven costs the same to run as a half-empty one, so maximize every cooking cycle.
Should I invest in energy-efficient equipment for winter cooking?
If you're running high-volume winter dishes, newer equipment pays for itself quickly. A 20% more efficient oven saves €720 annually if you're cooking 3 hours daily. Calculate payback period based on your actual usage patterns.
📚 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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