Many factors go into making the best potato chip, but the fryer is usually at the top of the list. Similarly, determining the best fryer design for a potato chip processor is complicated. Finally, product quality has the greatest influence on the decision; however, floor space, production capacity, acquisition cost, and method of heating cooking oil are all important considerations.

By Heat and Control

Working with a fryer manufacturer who has extensive experience in custom-designing fryers for each potato chip processor’s specific needs ensures that productivity and product quality will meet expectations, laying the groundwork for future growth.

The first factor to determine the best fryer design is determining the type of potato chip being produced. Does the processor wish to produce a conventional chip or a “hard bite”? Conventional chips are typically produced in a continuous fryer whereas hard bite chips are typically produced in a batch fryer.

Batch Fryers

Batch Fryers for Kettle Style Potato Chips – batch fryers are used exclusively for hard-bite, slow-cooked potato chips due to their unique temperature profile. The high-moisture content of potatoes requires a specially designed batch fryer. Potato-specific batch fryers use a kettle of static, hot oil which is directly heated by a gas burner firing under the fryer pan or by heat-transfer tubes immersed in the oil. These tubes can be heated by a gas burner, steam, or thermal fluid.

As each batch of potato slices enters the oil, the cooking oil temperature initially drops and then gradually increases as the moisture in the potato slice is boiled off and the burner system regains the proper frying temperature. This “inverted bell curve” temperature profile produces the distinctive hard-bite texture that has made these chips the fastest-growing segment of the potato chip market.

The art of adjusting this oil temperature profile gives processors the ability to create subtle differences in chip texture. Once these cooking parameters are set, sophisticated batch fryers use a programmable logic controller (PLC) to assure repeatable frying of each batch of chips. PLC systems give operators control of multiple machines and process functions, pre-programmed product menus, and complete data management at the touch of a single display screen. Heat and Control Batch Fryer capacities range from 16 to more than 227 Kilograms of finished potato chips per hour.

Advantages of Batch Fryers

Low cost (compared to continuous fryer systems) and adjustable temperature curve produces chips with unique textures. Multiple batch fryers can be handled by one operator because automatic slice stirring systems perform the cooking and unloading of the finished chips and eliminates the hazardous, labor-intensive task of manual stirring, and assures maximum chip uniformity by stirring each batch the same way each time.

You can read the rest of this article in your complimentary e-copy of Issue 2 of Potato Business Dossier 2022, which you can access by clicking here.