Nut Praline Found in a Nut-Free Assortment
A retailer reports that a “nut-free” 12-piece assortment contains a hazelnut praline. The plant runs hazelnut and non-hazelnut pralines on the same enrober and packing line. Changeover uses a dry wipe and a 70% alcohol spray; the allergen validation was done three years ago for a different nut. The lot code on the box maps to a production day when both products ran. The packing line had two operators, and trays from the previous run were left on a rack. Records show 1,200 boxes in the lot: 800 are in the warehouse and 400 are at the retailer. The hazelnut praline uses 12% hazelnut paste. The retailer wants a root cause and a recall decision within 24 hours.
1. Outline your traceability investigation and recall decision for this lot.
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Start with the lot code and build the chain in both directions. Identify the production date, shift, line, operators, and all raw material lots used, including the hazelnut paste lot. Pull the batch records, line clearance sheets, changeover records, label verification records, and packing count. Confirm whether the 400 retail boxes and 800 warehouse boxes are the only distribution; check whether any pallets were transferred, sold as samples, or held in another warehouse. Interview the two operators and the supervisor on duty.
Because the product carries a “nut-free” claim and hazelnut is an allergen, the precautionary principle applies. Recall all 1,200 boxes from the lot, not only the retail 400, and ask the retailer to stop sale and display a recall notice. Notify the relevant authority if required. Do not limit the recall to the single suspect box: the finding shows a breakdown in line clearance, so other boxes from the same changeover are reasonably suspected. Document the decision, time, quantities, and contacts.
2. What changeover and documentation failures most likely caused the mix-up?
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The dry wipe and alcohol spray are not a validated allergen cleaning procedure for an oily hazelnut paste on an enrober and packing line. Alcohol may sanitise but does not necessarily remove protein from crevices, belts, trays, or brushes. The validation was for a different nut three years ago, so it does not demonstrate removal of hazelnut protein under current line conditions. Trays left on a rack are a direct cross-contact route: a nut praline tray can contaminate the next product or be mistakenly packed.
Other likely failures include no formal line clearance checklist, no dedicated or colour-coded trays for allergen runs, no sequencing rule such as running nut-free first, and no allergen verification swab or ELISA after cleaning. The presence of two operators without a documented handover increases the chance that the tray was missed. The lot code record shows both products ran, but the records apparently did not capture which trays or utensils were used. This is a documentation and control failure, not merely an operator error.
3. What corrective actions and verification would you require before resuming nut-free production?
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Stop nut-free production until the changeover is validated. Clean the enrober, packing line, trays, utensils, and contact surfaces with a validated wet-cleaning procedure, then verify with allergen-specific ELISA swabs or similar tests on representative surfaces. Dedicate trays, utensils, and brushes to allergen or nut-free use, or replace those that cannot be cleaned. Add a line clearance checklist with sign-off by two people, covering trays, racks, waste, labels, and equipment. Introduce sequencing so nut-free products run first after a full clean, and require label and product verification at packing.
Retrain operators and supervisors on allergen cross-contact and the new clearance procedure. Audit the first three nut-free changeovers. Update the allergen risk assessment and validation records, and include hazelnut in the allergen matrix. Verify the recall effectiveness and close it only when all 1,200 boxes are accounted for. Document the root cause, corrective actions, and verification results in the quality system before the retailer is allowed to resume orders.