Restaurants lose an average of €12-45 daily on untracked sauce costs alone. That tablespoon of mayo costs 15 cents, but multiply by 100 daily portions and you're giving away €15 in 'free' extras. Here's exactly how to calculate what each sauce portion actually costs your kitchen.
Why calculate the cost price of sauces and dressings?
Most restaurant owners overlook sauce and dressing costs. Seems insignificant, but watch these numbers:
- Mayonnaise with fries: €0.12 per portion
- Garlic sauce with pizza: €0.18 per portion
- Salad dressing: €0.25 per portion
- Hollandaise sauce: €0.45 per portion
Serve 100 portions daily? You're spending €12 to €45 per day. That's €4,380 to €16,425 yearly in costs you might not be recovering.
⚠️ Watch out:
Don't forget oil, butter, herbs and spices. They're cheap per gram, but daily usage creates real expense.
Basic formula for sauce cost price
The math is straightforward:
Cost price per portion = (Total ingredient costs / Number of portions from recipe)
The challenge? Accurately calculating ingredient costs and determining portions per batch.
💡 Example: Mayonnaise
For 1 liter of mayonnaise you use:
- 3 egg yolks: €0.75
- 800ml sunflower oil: €1.20
- 2 tablespoons vinegar: €0.05
- 1 teaspoon mustard: €0.03
- Salt and pepper: €0.02
Total: €2.05 for 1 liter = €0.21 per 100ml portion
Step-by-step calculation
Follow these steps for every sauce or dressing:
1. Make a complete ingredient list
Document EVERYTHING that goes in:
- Main ingredients (oil, eggs, cream)
- Flavorings (herbs, spices, vinegar)
- Binders (flour, cornstarch)
- Even tiny amounts of salt and pepper
2. Calculate costs per ingredient
For each ingredient: recipe amount × price per unit
💡 Example: Garlic sauce
For 500ml garlic sauce:
- 400ml mayonnaise (€2.05/L): €0.82
- 4 cloves garlic (€3/kg): €0.12
- 2 tablespoons yogurt (€1.20/L): €0.04
- 1 tablespoon parsley (€8/kg): €0.12
- Lemon juice and pepper: €0.05
Total: €1.15 for 500ml = €0.23 per 100ml
3. Determine portion size
Measure how many grams or ml you serve per portion:
- Mayonnaise with fries: 15-20ml
- Salad dressing: 25-30ml
- Warm sauce with meat: 50-75ml
- Dipping sauce: 20-25ml
4. Calculate cost price per portion
Cost price = (total costs / total amount) × portion size
💡 Example: Hollandaise
1 liter of hollandaise costs €8.50 in ingredients. You serve 60ml per portion.
Cost price per portion: (€8.50 / 1000ml) × 60ml = €0.51
Common mistakes
Avoid these pitfalls during sauce cost calculations:
Forgotten ingredients
Herbs and spices seem inexpensive but add up fast. One teaspoon of saffron costs €0.15, fresh basil runs €0.25 per tablespoon.
Misjudging portion size
Measure several times to see actual serving amounts. It's typically more than you expect.
⚠️ Watch out:
Factor in waste too. Make 1 liter but toss 50ml? You've got 950ml for the same cost.
Not updating with price changes
Oil and egg prices fluctuate dramatically. After managing kitchen operations for nearly a decade, I've learned to update calculations every 3 months minimum.
Sauces in your food cost
Add sauce cost to dish cost for total food expense:
💡 Example: Steak with hollandaise
Selling price €32.00 (excl. VAT €29.36):
- Beef steak: €8.50
- Vegetables: €1.20
- Potatoes: €0.80
- Hollandaise: €0.51
Total food cost: €11.01 = 37.5%
Skip the sauce cost? You'd calculate 35.8% food cost instead. That 1.7% difference costs €0.50 per portion.
Keep track digitally
Tracking sauce costs manually in Excel gets messy quickly. Tools like KitchenNmbrs automatically calculate per-portion costs from your recipes, including all sauces and sides.
How do you calculate the cost price of sauces? (step by step)
Make your recipe complete
Write down all ingredients with exact amounts. Also salt, pepper and herbs. Measure everything during preparation so you know what really goes in.
Calculate the total ingredient costs
For each ingredient calculate: amount × price per unit. Add everything up for the total costs of your batch. Use current purchase prices from your supplier.
Determine how many portions you get
Measure out how many ml/grams you serve per portion. Divide the total amount by the portion size. Account for 5-10% waste.
Calculate cost price per portion
Divide the total ingredient costs by the number of portions. This is your cost price per portion. Add this to your dish cost price for the total food cost.
✨ Pro tip
Track your actual sauce usage for 2 weeks straight - you'll find portions run 25-35% larger than expected, especially with crowd favorites like garlic sauce and mayo. Most kitchens underestimate by at least €3-5 daily.
Calculate this yourself?
In the KitchenNmbrs app you can do this in just a few clicks. 7 days free, no credit card.
Was this article helpful?
Frequently asked questions
Do I also need to include salt and pepper in the calculation?
Yes, even small amounts matter. Salt and pepper might cost 1-2 cents per portion, but volume adds up. Include everything for accurate costing.
How often should I update my sauce cost prices?
Every 3 months minimum, or immediately after supplier price increases. Oil and eggs fluctuate significantly. Check your top-selling sauces monthly.
Can I estimate the cost price instead of calculating exactly?
Estimates usually run too low. Hollandaise seems cheap but with butter and egg yolks hits €0.50 per portion easily. Calculate exactly for reliable numbers.
What if I serve different portion sizes?
Calculate multiple cost prices then. Small mayo portion 15ml = €0.12, large portion 25ml = €0.20. Use the right cost for each dish.
📚 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.
Calculate it yourself with KitchenNmbrs
All the formulas you learn here — KitchenNmbrs calculates them automatically. Enter your ingredients and instantly see your food cost, margin, and selling price. Try it free for 14 days.
Start free trial →