Menu costing is rarely the problem in itself. The problem is that it is treated as a one off exercise, done properly when the menu launches and never revisited while supplier prices, portion sizes, and the menu mix all move underneath it.

The operators who hold their margin over time are not necessarily the ones with the most sophisticated systems. They are the ones with a small number of habits they actually keep. Here are eight worth building.

1. Cost to the gram, not to the packet

A recipe that says one packet of cream or a handful of coriander cannot be costed. Every ingredient in every dish needs a weight or a volume, including oil, garnish, sauce, and the bread that goes out with it. The items people skip are usually the ones that quietly move.

2. Cost the trim, not just the yield

If you buy a whole fish and serve the fillets, your cost per portion is based on the usable weight, not the purchase weight. The same applies to vegetables you peel, meat you break down, and anything that loses weight in cooking. Costing on purchase weight understates your food cost, sometimes badly.

3. Rank dishes by contribution dollars, not popularity

Popularity tells you what people order. Contribution tells you what you keep. Build a simple matrix that plots how often each dish sells against how much gross profit it returns in dollars, and the picture usually surprises people. The dishes in the high volume, low contribution corner are where the money is going.

4. Re-cost when the invoice changes, not when the year ends

Supplier prices move constantly, and the movement is rarely announced. Set a fixed point each month to update the costing sheet with your actual invoice prices for your top twenty ingredients by spend. Twenty ingredients usually account for the large majority of your food cost, so this takes far less time than it sounds.

5. Keep one costing sheet, owned by one person

The most common failure is not a lack of costing but the existence of three versions of it: one with the chef, one in the office, and one from the accountant. Decide which file is authoritative, decide who updates it, and make everyone else read from it.

6. Account for the things that never get rung up

Staff meals, tasting portions, comps, remakes, and items given away to resolve a complaint are all real food cost that never appears as revenue. If they are not tracked, they show up as an unexplained gap between your theoretical and actual food cost. Even a rough weekly count is better than nothing.

7. Watch the modifiers

Extra cheese at no charge, a second sauce, an upsized portion for a regular, free refills on a side. Each one is a small decision made at the pass or the counter, repeated hundreds of times a month. Either price them or set a clear rule about them, but do not leave them to individual judgement.

8. Test a price change on one section before you move the whole menu

When a costing exercise says prices need to move, resist the urge to reprice everything at once. Change one section, watch what happens to the mix and to customer response over three or four weeks, then apply what you learn. A menu wide increase gives you no way of knowing which change worked.

Making it stick

None of these habits are difficult. They fail because nobody owns them, or because the costing sheet is built in a way that is painful to update, so it stops being updated within two months.

Salt and Ledger costs menus to the gram and rebuilds them around contribution rather than popularity. The engagement includes a full recipe costing, a contribution and popularity matrix, a re-engineered menu with pricing, and a costing sheet your team can maintain after we have gone.

If your food cost has drifted and you are not sure where, email info@saltandledger.com.sg with your current food cost percentage and how many dishes are on the menu. We will tell you what we would look at first.