How to Calculate Recipe Costing Step by Step

What recipe costing is (and why it matters)

A recipe costing — also called a plate costing or dish costing — is the detailed breakdown of what a dish costs to produce: every ingredient with its exact quantity, its corrected purchase price and its proportional cost per serving. The output is a single hard number: what it costs you to put that plate on the table before any margin.

Without costings you are flying blind: your best-selling dish could be losing money on every order without anyone noticing. With up-to-date costings you can price with confidence, spot supplier increases the week they happen, and decide with data which dishes to push and which to drop from the menu.

Waste and yield: the real cost of an ingredient

The most expensive mistake in recipe costing is using the invoice price without correcting for waste. Waste (or trim loss) is the part of the product you lose when cleaning, boning or cooking it; yield is the usable percentage that remains.

A real example: you buy whole hake at 14 €/kg. After cleaning it (head, bones, skin) you lose 35% of the weight, so each kilo leaves you with only 650 g of usable fillet. The real cost of a clean kilo is not 14 € — it is 14 / 0.65 = 21.54 €/kg. That is 54% more than the invoice says, and it is this corrected price that belongs in the costing.

The general formula: real cost = purchase price / yield. At an 80% yield (20% waste), a product invoiced at 10 €/kg actually costs you 12.50 €/kg. To measure your own yields, weigh the product as purchased and again once cleaned and ready to use; repeat two or three times and work with the average.

Cost per serving, with a full example

Once you have the real cost of each ingredient, multiply by the quantity that goes into one serving. Staying with our hake fillet in green sauce:

• Cleaned hake: 180 g × 21.54 €/kg = 3.88 €
• Clams: 60 g × 12.00 €/kg = 0.72 €
• Extra virgin olive oil: 20 ml × 4.50 €/l = 0.09 €
• Garlic, parsley, flour and white wine: ≈ 0.25 €
• Potato side: 120 g × 1.20 €/kg = 0.14 €
• Food cost per serving: 5.08 €

Add disposables and labour for a sharper picture

A basic costing stops at the raw ingredients, but you can get much closer to the true cost of service. Add direct disposables (napkin, placemat, packaging for takeaway) and preparation labour: the minutes the dish takes multiplied by your kitchen cost per minute.

In our example: if the hake takes 8 minutes of preparation and your kitchen cost is 0.25 €/minute (roughly 15 €/hour including employer costs), add 2.00 € of labour plus around 0.10 € of disposables. The full cost per serving is now about 7.18 €, against 5.08 € of pure food cost — a difference that completely changes how you read the margin.

Nested costings: sub-recipes inside finished dishes

In a real kitchen almost no dish is built from raw ingredients alone: it carries stocks, mother sauces, doughs or bases that are produced in batches and shared across several dishes. The right approach is to cost each base preparation separately and then treat it as one more ingredient.

Example: you cost a fish stock (bones, vegetables, water, 40 minutes of cooking) and it comes out at 1.80 €/litre. When the green sauce uses 100 ml of stock, you charge 0.18 € to the dish. The payoff comes over time: if vegetable prices rise tomorrow, you update the stock costing once and the change cascades automatically into every dish that uses it.

Common recipe costing mistakes

These are the errors that distort the real cost of a dish the most — and the easiest ones to fix:

• Ignoring waste: using invoice prices on products that lose 20-40% of their weight in preparation.
• Forgetting the 'small' ingredients: oil, salt, spices and garnish easily add 0.20-0.50 € per serving.
• Stale prices: a costing from six months ago, with purchase prices moving every week, is fiction.
• Not weighing portions on the line: if cooks plate 220 g where the spec says 180 g, your real cost drifts 22% and the costing never shows it.
• Costing once and filing it away: a recipe costing is a living document — review it at least quarterly and whenever a supplier changes.

Frequently asked questions

What is the difference between a recipe and a recipe costing?

The recipe describes how the dish is made: technique, steps and timing. The costing quantifies what it costs: exact quantities, yield-corrected prices and total cost per serving. Ideally both live on the same spec sheet.

How often should I update my recipe costings?

Update the prices of your key ingredients weekly or with every invoice, and review each dish's full costing at least once a quarter. After any sharp supplier increase, update the affected dishes immediately.

How do I calculate the yield of an ingredient?

Weigh the product as purchased, then weigh it again once cleaned and ready to use. If 1 kg of hake leaves 650 g of fillet, the waste is 35% and the yield 65%. Measure it two or three times and work with the average.