Batch Recipe Scaler with Cost per Portion and Shopping List

Batch Recipe Scaler is an offline app (one HTML file in a zip) for a home kitchen, caterer or small food maker. You write each recipe once, for the batch you normally make. When an order comes in for forty portions you add a production run, and the app prints the scaled quantities for the cook, works out the cost of the run and the cost of one portion, and adds the run to a shopping list that covers everything you planned.

The problem it removes: A recipe for ten portions has to be made for forty, then for fifteen, then for sixty. The scaling is done on a phone calculator, one ingredient wrong spoils a batch, peeling and bone loss are forgotten so the real cost is higher, and the shopping list is rebuilt from memory. This app scales every ingredient the same way and costs the batch from the pack prices you pay.

What is inside:

• Ingredients with pack size, pack price and the share you can use after peeling or trimming, giving the true cost of what goes in the pot
• Recipes written for one batch, with the number of portions it makes and the price you sell a portion for
• Production runs: choose a recipe and the portions you need, and every line is scaled, with kilograms and litres shown when the amount is large
• Cost of the run, cost per portion, food cost percentage against the target you set, and recipes that are over target
• One shopping list for all planned runs: quantity needed, stock you have, packs to buy and what they cost
• Printable production sheet for the cook and a recipe cost sheet
• Example data you can load in one click, a Start here guide and an Honest limits panel
• JSON backup and restore, CSV export, and CSV import with a check of every row before anything is added

Who it is for: home kitchens, meal sellers, caterers, bakers and small food producers in the UAE who cook the same recipes in different batch sizes and want to know what each portion costs.

What it is NOT: It does not know your recipe is good, does not set a safe shelf life, does not give nutrition or allergen advice, and does not track stock movements: the stock you enter is a number you type. Scaling is simple proportion, so strongly flavoured items such as spices and salt may need your taste. Prices are the pack prices you enter, without VAT. It is not legal, tax or accounting advice, it is not connected to any government system, bank or messaging service, and it does not file or send anything by itself. UAE e-invoicing is not part of it.

Your data stays on this device in your browser. Back it up with Export; clearing browser data loses it otherwise.

Verified by us: scripted tests in Chromium (148 checks through the real screens: adding, editing and deleting records in every table, required-field messages, backup then clear then restore, CSV export then import, keyboard order, print layouts rendered to PDF, no horizontal scrolling at 375 and 1280 pixels, no network requests) and an independent recalculation by a separately written Python evaluator of 1689 calculated values (25 randomised rows plus the example data) with 0 mismatches. Safari engine (WebKit): smoke test passed; Firefox: could not be launched. Not tested: Firefox beyond what is stated here, and no real printer was used (print layouts were checked as PDF).