Diners increasingly decide where to eat after watching a video, and food cost is what decides whether that table is worth anything.

Finding 1 — How do you calculate restaurant food cost dish by dish?

Add up every ingredient in the recipe card using real yield loss, divide by the pre-tax selling price and multiply by one hundred:

that is the dish food cost, and 32% is the ceiling of the Masterestaurant method, never a target. Yield is the part almost nobody applies. A loin that yields 68% after butchering does not cost what the invoice says; it costs the invoice divided by 0.68. Once that adjustment enters the spec sheet, a dish that read 28% suddenly reads 38%, and that is precisely the dish your content is pushing. You run the math per recipe, with grams weighed in the kitchen rather than guessed on a spreadsheet, because 63.1% of users discover new products and trends on TikTok according to The Influence Agency (2025) and you decide which plate they see.

Finding 2 — The viral that cost EBITDA

A three-unit group in Madrid piled up 1.9 million Reels views in one quarter and closed with less EBITDA than the quarter before, because all three virals pointed at the seafood dish, the highest food cost on the menu, while the companion promo gave away the drink, where the contribution margin lived. Platform numbers swelled as the cash line drained. Nobody asked the boring question: which dish does this content push, and what does it cost. With food and drink videos averaging 135,200 views on Instagram and 220,800 on TikTok according to Restroworks (2025), reach is no longer the industry's problem; the problem is reach aimed at the wrong plate, followed by giving away the drink, the highest-margin line on the check.

Finding 3 — Contribution margin in euros, never in percentage

Contribution margin is net selling price minus direct variable cost, measured in euros per dish rather than percentage, because payroll is not paid with percentages. I got this wrong for years: I chased a 26% food cost across the whole menu and hit it by selling pasta while the restaurant lost money. A rice dish at 34% food cost that leaves 14 euros of margin pays more payroll than a salad at 22% leaving 5. With 38% of Gen Z restaurant discovery happening on TikTok according to Toast (2026), from a survey of 1,466 U.S. adults, deciding which dish to film is a decision about absolute margin. Sort the menu by contribution euros instead of percentage, then film the top four.

Finding 4 — The content-to-table conversion index, defined so it can be measured

Divide covers or orders attributed to a piece by its unique reach inside a 30-day window: that percentage is the only number linking the platform column to the cash column. Without a window there is no index, since an August booking credited to a May Reel is a story, not a measurement. First-party channels are where attribution exists and where the check climbs: loyalty members buy more often on first-party platforms according to Paytronix (2024). Push your content traffic to an aggregator and you hand over the commission, the attribution, and the very data you needed to run this calculation.

Finding 5 — What happens if the index rises and margin falls

Picture doubling the conversion index from 0.4% to 0.8% on 200,000 views: 800 new covers instead of 400. Should those covers arrive through a dish at 38% food cost with 9 euros of contribution, you add 7,200 euros; through one at 30% with 16 euros, you add 12,800. Same content spend, a 5,600-euro gap, and the second option demands less kitchen work per cover. The ugly scenario is the third one: the index climbs, the line saturates, ticket times stretch, reviews slip, and you pay overtime to destroy the reputation that filled the room. Station capacity therefore belongs in the equation before the post is scheduled, not afterwards.

Finding 6 — The tension between the offer that fills the room and the one that empties the till

Discounting works and is dangerous at the same time, and that contradiction resolves by looking at what gets discounted: 29% of U.S. restaurant traffic over twelve months arrived with some form of deal according to Circana (2025), while value menus grew 1% in the quarter to June 2025 as total traffic fell 1%. Offers bring people, that much is measured. What wrecks the till is discounting the item with the highest contribution in euros, usually the drink, instead of the low-food-cost dish with high perceived value. Give away the 1.10-euro dessert before the 9-euro glass of wine. The same promotion, with the object swapped, moves an entire quarter's result without touching a single view.

Finding 7 — Repeat business: the index that actually pays the bill

Returning guests cost no content, which is why a well-calculated food cost matters more on the second visit than on the first. The arithmetic is hard to swallow: if your recipe card is off by two points and the guest returns nine times a year, you give that error away nine times, not once. Diego F. Parra insists at Masterestaurant on reviewing the ten best sellers every 90 days against current supplier prices, because inflation on one specific commodity eats the margin quietly while the content keeps performing beautifully.

Finding 8 — Monday's first action

Open the last 90 days of sales, keep the ten best-selling dishes and calculate their real food cost with yield loss and this week's invoice, not last year's. Sort that list by contribution euros. The top four become your content calendar for the quarter, and the bottom one, if it also monopolizes the hot line, leaves the menu or goes up in price. The business listing weighs more than it looks in this journey: 71% of consumers read reviews before choosing where to eat according to BrightLocal (2024), and 62% discover restaurants via Google according to Restroworks (2024). The right dish in the right photo pays for itself.

Finding 9 — Operating definitions: what each index metric actually measures

CONTENT-TO-TABLE CONVERSION INDEX: share of people exposed to a content piece who end up seated or ordering first-party within a 30-day window. Unit: %. Calculated by dividing attributed covers or orders by the unique reach of the piece. DISH FOOD COST: raw material cost of a recipe divided by its net selling price. Unit: %. How to calculate restaurant food cost in one line: add each ingredient cost including real waste, divide by net menu price, multiply by one hundred. Method ceiling: 32%. CONTRIBUTION MARGIN: net selling price minus direct variable cost of the dish. Unit: currency per dish, never a percentage. This is the figure that pays payroll, rent and utilities, which are NOT loaded onto the plate but onto break-even.

Finding 10 — Operating definitions: what each index metric actually measures — in practice

PRIME COST: food and beverage cost plus total labour cost, over net sales. Unit: %. It is the real operating traffic light when isolated food cost misleads you. CUSTOMER ACQUISITION COST: total spend on content production, paid media and commissions divided by identified new customers in the period. Unit: currency per customer. Without identification there is no CAC, only a budget. 90-DAY REPEAT RATE: share of customers identified in month one who return within the following 90 days. Unit: %. It is the multiplier that turns a campaign into a business. TERRITORY RISK: share of demand depending on a single channel, platform or catchment area. Unit: %. Above 40% in one channel, your growth plan belongs to somebody else's company.