Most restaurants treat seasonal dishes as static recipes, yet the ingredients behind them constantly shift. Dutch asparagus costs €12/kg in May while Peruvian asparagus runs €8/kg in December. You need a system that captures exactly which supplier and product variant goes into each seasonal dish.
Why seasonal registration matters for your bottom line
Seasonal dishes mean ingredients never stay constant. Dutch asparagus in May costs €12/kg, Peruvian asparagus in December €8/kg. Both show up as 'asparagus' in your recipe, but your margin swings wildly.
⚠️ Note:
Many restaurants don't update their recipes seasonally and unknowingly lose money on popular seasonal dishes.
Here's the issue: your recipe 'Grilled asparagus' looks identical on paper, but actual food cost can swing 40% between seasons.
Building your seasonal tracking system
Effective seasonal registration breaks down into three components:
- Supplier per season: Who supplies which product when
- Product variant: Origin, quality, packaging
- Price history: What it cost last season
💡 Example:
Asparagus in your spring recipe:
- March: Import from Peru - Supplier A - €8.50/kg
- April: Dutch early season - Supplier B - €15.00/kg
- May: Dutch top quality - Supplier B - €12.00/kg
- June: Dutch late season - Supplier C - €9.50/kg
Food cost per portion (200g): €1.70 to €3.00
Digital vs. manual registration
Excel sheets and notebooks work fine until you're juggling 5+ seasonal dishes with 3-4 changing ingredients each.
Manual systems break down because of:
- Forgetting to update prices
- No overview of seasonal trends
- Calculating food cost takes too much time
- Errors when switching suppliers
From tracking this across dozens of restaurants, digital systems handle seasonal complexity far better. Tools like KitchenNmbrs let you record multiple suppliers per ingredient with seasonal periods. You see instantly which supplier's active and what your current food cost runs.
Smart supplier-switching strategy
Some products follow predictable seasonal schedules. Map out your supplier switches ahead of time:
💡 Example: Tomato planning
- Jan-Mar: Spanish greenhouse - €4.20/kg
- Apr-Jun: Dutch greenhouse - €3.80/kg
- Jul-Sep: Dutch field grown - €2.90/kg
- Oct-Dec: Spanish import - €4.50/kg
Plan your menu update in March and September when prices change the most.
Track quality differences between suppliers
Not every supplier delivers identical quality. Document these differences in your system:
- Trimming loss: Whole fish from supplier A: 45% loss, from B: 40%
- Shelf life: Lettuce from supplier X: 3 days, from Y: 5 days
- Portion size: 'Large' shrimp from A are 'medium' from B
⚠️ Note:
A cheaper supplier with more trimming loss can ultimately be more expensive. Always calculate with net yield, not gross purchase price.
Strategic seasonal menu planning
Good seasonal registration enables smart menu planning:
- Profitable seasons: Which months does dish X have the best margin
- Price adjustments: When do you raise menu price due to more expensive ingredients
- Alternative recipes: Cheaper variant for expensive seasons
💡 Example: Seasonal strategy
Your 'Sea bass special' has different seasonal variants:
- Winter: Sea bass + root vegetables (food cost €11.50)
- Spring: Sea bass + asparagus (food cost €14.20)
- Summer: Sea bass + zucchini (food cost €10.80)
- Fall: Sea bass + mushrooms (food cost €13.60)
Menu price: €39 (winter/summer) and €42 (spring/fall)
How do you set up seasonal registration? (step by step)
Create a supplier overview per ingredient
For each seasonal ingredient, note which suppliers you use and in which period. Add price, quality and delivery time. This becomes your seasonal calendar.
Document product specifications per season
Record which variant you use: origin, packaging size, quality grade. Also note trimming loss and shelf life per supplier.
Update food costs when seasons change
Schedule fixed times (beginning of each month) to check prices and adjust recipes. Verify your menu price still works with the new food cost.
✨ Pro tip
Set up your seasonal supplier database 8 weeks before each transition period. Contact your top 3 suppliers in early February for spring pricing - this gives you time to negotiate better rates and plan menu changes without rushing decisions.
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 update my seasonal prices?
Check at least monthly, but weekly during seasonal transitions (March, June, September, December). Prices can shift daily during these periods.
Can I use the same recipe with different suppliers?
Yes, but document the differences in trimming loss and quality. A cheaper supplier with higher waste can end up costing more per usable portion.
Do I need to adjust my menu price per season?
Not always necessary. Small price differences (up to 10%) can let margins fluctuate naturally. Large differences (20%+) usually require adjustment to maintain profitability.
How do I prevent forgetting to switch suppliers seasonally?
Set calendar reminders for the 1st of each month to review suppliers and prices. Digital systems can automate these seasonal switch notifications.
What if my regular supplier suddenly can't deliver?
Always maintain backup suppliers for each seasonal ingredient. Keep their prices and quality notes current so you can switch quickly without margin loss.
Should I track organic vs. conventional variants separately?
Absolutely - they're different products with different costs and customer appeal. Many restaurants charge premium prices for organic seasonal dishes to justify the higher ingredient costs.
📚 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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