Shared Equipment & Allergen Risk: Fryers, Grills & Prep Surfaces

Flat grills and griddles present a cross-contact risk because food residues can transfer between items cooked on the same surface. Chargrills and ridged griddles are particularly difficult to clean thoroughly due to their uneven surfaces. Controls for grills include cleaning between allergen and allergen-free items (scrape, wash with hot soapy water, rinse), using designated zones on the grill surface for allergen-free cooking, cooking allergen-free items first on a clean grill before allergen-containing items, and using foil or grill mats as a barrier when cooking allergen-free items on a shared surface. Foil barriers are widely used but have limitations: they prevent direct surface contact but do not eliminate airborne transfer from splattering or steam. For items marketed as allergen-free, a barrier approach should be documented in your risk assessment with an acknowledgment of its limitations. Conveyor ovens and combi ovens present similar issues. If you bake gluten-containing bread and then bake gluten-free items in the same oven, flour residues on racks, trays, and oven surfaces can transfer.

Every piece of shared equipment that handles both allergen-containing and allergen-free food should appear in your allergen risk assessment. For each item, document what allergens it is exposed to during normal use, what control measures are in place (dedicated equipment, cleaning between uses, barriers, sequence controls), how effectiveness is verified (visual inspection, lateral flow testing, scheduled deep cleaning), and what happens when controls fail (corrective actions, product disposal, incident reporting). This documentation serves two purposes: it forces you to think through the risks systematically, and it provides evidence of due diligence during an EHO inspection. An inspector who sees a comprehensive equipment risk assessment with documented controls and verification records will view your allergen management far more favourably than one who finds no documentation, even if the practical controls are identical.