Picture this: you're crafting artisanal butter in-house, feeling proud of those cost savings. But here's what most chefs miss - those "free" homemade ingredients actually carry hidden costs that can silently drain your profits. The real challenge lies in calculating what that butter or cheese truly costs your kitchen.
Why homemade products aren't free
Sure, making your own butter or cheese feels cost-effective. You don't see an invoice, so it seems like pure profit. But every homemade ingredient carries real expenses:
- Raw material costs: Cream for butter, milk for cheese
- Labor time: How many hours do you actually spend on it?
- Yield: You won't get 1 kilo of butter from 1 liter of cream
- Failure costs: Sometimes batches just don't work out
⚠️ Watch out:
Most restaurants only factor in raw materials and ignore labor plus yield. That's how your margin looks healthier than it really is.
Calculate the true cost price per kilo
For each homemade ingredient, you'll need this formula:
Cost price = (Raw material costs + Labor cost) / Yield in kilos
? Example homemade butter:
You make butter from 2 liters of whipping cream at €4.50/liter
- Raw materials: 2 × €4.50 = €9.00
- Labor: 45 minutes × €20/hour = €15.00
- Yield: 800 grams of butter
Cost price: (€9.00 + €15.00) / 0.8 kg = €30.00/kg
Compare that to store-bought artisanal butter (€18-25/kg). Your homemade version costs more than you thought.
Estimate labor costs realistically
Here's one of the most common blind spots in kitchen management: underestimating labor time. Don't just count active time (stirring, kneading). Include everything:
- Preparation: Setting out ingredients, checking equipment
- Waiting time: Ripening, resting, drying - you can't leave the kitchen
- Cleanup: Cleaning equipment, putting everything away
- Quality control: Tasting, evaluating
? Example making cheese:
Fresh goat cheese from 3 liters of milk
- Milk: 3 liters × €2.20 = €6.60
- Rennet and salt: €0.40
- Labor: 2.5 hours × €22/hour = €55.00
- Yield: 600 grams of cheese
Cost price: (€7.00 + €55.00) / 0.6 kg = €103.33/kg
Use the gross hourly wage you'd pay a chef for labor costs, including employer contributions (roughly €20-25/hour for an experienced cook).
Calculate yield correctly
You'll never get 100% finished product from raw materials. Cheese and butter lose moisture during production:
- Butter from cream: Yield 35-45%
- Fresh cheese from milk: Yield 15-25%
- Aged cheese: Extra moisture loss, yield 10-18%
Measure several batches to determine your average yield. But calculate using your lowest yield, not your best results.
Include failure costs
Not every batch turns out perfect. Cheese can become too sour, butter won't bind properly. Add 5-15% failure costs on top of your cost price:
Final cost price = Basic costs × (1 + failure percentage)
? Example with failure costs:
Your butter costs €30.00/kg basic, 10% of batches fail
- Basic costs: €30.00/kg
- Failure costs: 10%
True cost price: €30.00 × 1.10 = €33.00/kg
Calculate margin with homemade ingredients
Now that you know the true cost price, calculate margin as usual:
Food cost % = (Total ingredient costs / Selling price excl. VAT) × 100
Add up all ingredients, including your homemade products at their true cost price. Tools like KitchenNmbrs can help track these complex calculations automatically.
⚠️ Watch out:
Always calculate using the selling price excluding VAT. For restaurant food, that's your menu price divided by 1.09.
Deciding if making your own pays off
Compare your true cost price with purchasing from suppliers:
- Cheaper + better quality: Making your own makes sense
- More expensive but unique: Could still work for your concept
- More expensive and not better: Consider buying instead
And don't forget - time spent making cheese could be used for other profitable kitchen tasks.
Related articles
How do you calculate the margin with homemade ingredients?
Calculate cost price of homemade ingredient
Add raw material costs and labor cost, divide by the yield in kilos. Add 5-15% failure costs for failed batches.
Add up all ingredient costs
Make a list of all ingredients in your dish. For homemade products use the cost price from step 1, for purchased ingredients use your purchase prices.
Calculate food cost percentage
Divide total ingredient costs by your selling price excluding VAT and multiply by 100. For restaurant food divide the menu price by 1.09 to get the price excl. VAT.
✨ Pro tip
Track your actual labor time for 3 batches of each homemade ingredient, then add 20% buffer time. Most chefs underestimate by at least 30 minutes per batch once you include all prep and cleanup.
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 my own time in the cost price?
How do I know what my yield is for homemade cheese?
Can I skip failure costs if I'm experienced at making these products?
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
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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