An accessory for measuring temperature in solidified products such as frozen meats and frozen food in general, adapted to pierce the frozen product. The accessory comprises a cavity enclosing a thermometry element suitable for such purpose and is defined by a body made of a thermo-conducting material. The accessory comprises a tubular portion that can be inserted into the product which temperature needs to be measured, and an operator handle for the accessory. A cavity enclosing a temperature sensing element extends along the tubular portion to the proximity of its distal end, which has a pointed end. The distal section of the tubular portion comprises at least one helical cutting edge for cutting the frozen product, which allows the insertion of the accessory when being turned. The operator handle is perpendicular to the longitudinal axis of the tubular portion, and comprises a hole that connects with the cavity that contains the temperature sensing element.