PREVRA Recipe Calculator: Scale Batches, Calculate Allergens, Standardise Every Dish
A structured calculator for scaling recipes across batch sizes, identifying allergens, and calculating nutritional data. Keeps every portion consistent, safe, and legally labelled.
Why recipe consistency is a food safety issue
Most chefs treat recipe scaling as a culinary exercise. In a regulated food business, it is a legal compliance task. Every ingredient in every dish contributes to your allergen declaration, your nutritional labelling under Natasha's Law, and your HACCP critical control points for cooking and cooling. An inconsistent recipe means inconsistent safety data — and an EHO will notice if your paperwork does not match what is happening in the kitchen.
Here is the counter-intuitive part: measurements like "a pinch of salt" and "a dash of vinegar" are legally problematic. Under UK food labelling regulations, any ingredient that appears in the final product must be declared quantitatively in the ingredients list. You cannot declare quantities you have not measured.
Standardising every dish across your kitchen operation
Enter your base recipe with precise weights for every ingredient. The calculator scales to any batch size while maintaining ratios. Flag every allergen present across all 14 declarable categories. Calculate nutritional values per 100g and per portion. Use the output to populate your Natasha's Law labels and your HACCP cooking and cooling records.
Digital SFBB integrates recipe data with your allergen matrix and temperature logs. When you update a recipe, related labels and records update automatically. Your EHO sees a single source of truth rather than reconciling three different paper records.
Recipe errors that compromise compliance
Scaling by volume rather than weight for dry ingredients — a cup of flour varies by up to 30% depending on how it is packed. Forgetting to include garnishes and finishing oils in the allergen calculation. Using "glug" or "splash" as measurement units when those ingredients contain allergens like sulphites in wine.
See also: Recipe Card Generator and Natasha's Law Checklist.
Prevra · Early access
Prevra is building a digital SFBB app.
The app is not ready yet. See the planned features and contact us about early access.
See planned features