Working with sub-recipes turns cost calculation into a multi-layered puzzle that most restaurants solve incorrectly. You're making dishes with homemade sauce, marinade and garnish, but calculating each component separately feels overwhelming. Most kitchens just estimate these costs, leaving them blind to their actual margins.
What are sub-recipes?
Sub-recipes are recipes within recipes. Think of:
- Homemade sauces and dressings
- Marinades and rubs
- Garnishes and decorations
- Side dishes you make yourself
- Rolls, pastas or other base components
Each sub-recipe carries its own ingredient costs and therefore its own price tag.
The challenge of nested calculations
Things get messy because you need to track:
- How much does each sub-recipe cost per portion?
- How much of each sub-recipe goes into the main dish?
- How do you add all this together without losing your mind?
⚠️ Watch out:
Most kitchens ignore the labor and energy costs baked into sub-recipes. That homemade mayonnaise might cost only €0.50 in ingredients, but requires 15 minutes of prep time.
Step-by-step method
The most accurate approach works from bottom to top:
1. Calculate each sub-recipe separately
Start with your smallest component. Let's say you're making homemade aioli:
💡 Example: Aioli (10 portions)
Ingredients:
- 2 egg yolks: €0.40
- 200ml olive oil: €1.60
- 1 lemon: €0.30
- 2 cloves garlic: €0.20
- Salt, pepper: €0.05
Total: €2.55 for 10 portions = €0.26 per portion
2. Calculate the main recipe
Now you build the main dish, treating sub-recipes as single ingredients:
💡 Example: Grilled salmon with aioli
Per portion:
- Salmon fillet 180g: €4.20
- Aioli (1 portion): €0.26
- Vegetables: €1.50
- Olive oil, herbs: €0.30
Total cost price: €6.26
3. Check your portion sizes
Pay attention to how much you actually use of each sub-recipe. Your recipe might call for 20ml of aioli, but is your chef secretly dolloping 30ml?
Digital tools
Manual calculation gets overwhelming fast. Excel requires separate tabs for each sub-recipe. After managing kitchen operations for nearly a decade, I've found that specialized apps can link sub-recipes to main recipes automatically, updating costs in real-time.
💡 Example: Complex calculation
Pasta with homemade pesto and roasted vegetables:
- Pasta (homemade): €0.45
- Pesto (sub-recipe): €0.85
- Roasted vegetables (sub-recipe): €1.20
- Parmesan: €0.60
- Olive oil: €0.15
Total: €3.25 cost price
Common mistakes
Mistake 1: Skipping the small stuff
You calculate salmon and vegetables but forget that €0.26 aioli per portion.
Mistake 2: Wrong portion assumptions
You plan for 20ml sauce but actually serve 35ml.
Mistake 3: Stale sub-recipe costs
Olive oil prices jump, but you only update main recipes.
⚠️ Watch out:
Price changes ripple through every recipe that uses your sub-components. Updating becomes a nightmare if you're managing dozens of homemade elements.
Worth the effort?
Calculate sub-recipes separately if:
- You use many homemade sauces and components
- Sub-recipes appear in multiple dishes
- You need precise cost tracking
- Your team frequently deviates from standard portions
Simple dishes with minimal sub-components? An estimate often works fine.
How do you calculate cost price with sub-recipes? (step by step)
Make a list of all sub-recipes
Write down which components you make yourself: sauces, marinades, garnishes, side dishes. Also note which main dishes you use them in.
Calculate each sub-recipe separately
Add up all ingredients of each sub-recipe. Divide by the number of portions you make from it. Now you know the cost price per portion of each sub-recipe.
Treat sub-recipes as ingredients
In your main recipe you calculate: main ingredient + sub-recipe 1 + sub-recipe 2 + other ingredients. The sub-recipes now have a known cost price per portion.
Check actual portion sizes
Measure for a week how much your team actually uses of each sauce and component. Often this differs from what you have on paper.
Update all levels regularly
When ingredient prices change, update your sub-recipes first. Then your main recipes are automatically adjusted (if you use a digital system).
✨ Pro tip
Weigh your actual sub-recipe portions for 48 hours straight and compare against your recipe specs. You'll discover portion creep that's been silently eating your margins for months.
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
Do I really need to include every small ingredient in sub-recipes?
Salt, pepper and basic herbs can get a standard 3-5% markup on your total cost. But expensive ingredients like truffle oil or saffron need exact calculations.
How often should I recalculate my sub-recipes?
Check main ingredient prices monthly. Olive oil, eggs and dairy fluctuate regularly and appear in most sauces.
What if I use a sub-recipe in different quantities?
Calculate cost per 100ml or 100g of your sub-recipe. Then you can easily figure out what 25ml aioli or 150g marinade costs per dish.
Is it worth tracking simple sauces like vinaigrette?
If you use it in more than 3 dishes and it costs over €0.20 per portion, yes. Otherwise, stick with estimates.
How do I prevent this from getting too complicated?
Start with your 3 most expensive sub-recipes that you use most often. Once those are dialed in, you'll have 80% of your costs under control.
What happens when my supplier changes prices mid-month?
Focus on your top 5 most expensive sub-recipe ingredients and update those immediately. Minor ingredients can wait until your monthly review cycle.
📚 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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