Fried french fries process technology overview

Fried french fries process technology overview

Short Description:
Today the major processed products are potato crisps and French fries in the world.

According to American standards, the oil content in French fries should range from 5 to 7% and up to 4% in partially fried French fries.


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As we know, most final Fried French Fries which is ready to eat by means of the second frying of froze French fries, an industrial food stuff materials.

The final oil and moisture content of French fries are of almost 15% and 38%, respectively.

As the French fries materials, there is a different between frozen potato fries and potato chips making process. The most obvious is that Potato chips are thin and particularly crisp while French fries are of an external crispy surface and a free of oil cooked core.

Adequate solids and low glucose content potato tubers are important in both frozen fries and potato chips process.

Frozen French fries process usually first are potato washing, potato tubers peeling, potato fries slicing and defect removal, then following further blanching, drying, partial par-frying in the manufacture of frozen fries are more vital.

Potato fries blanching prior to frying in order to improve the colour. The raw potato strips are blanched in hot water and  with hot air partly drying until reaching a moisture content of around 60% to prevent limpness and separation of the interior and the crust.

The par fry is a much important cooking stage where the strips are cooked for a about a minute and a half in oil that’s a bit hotter than normal French Fry cooking temperatures. The sticks are fried at 180℃ for about 2 minutes or at 150℃ for about 5 minutes to get a light golden color. The final product comprises around 10% fat, most of which is retained on the surface.

The final step is blast quick freezing of the strips which travel down on the wire conveyor using air cooled down to about -40℃ and stored at – 20℃. This prevents them sticking together and helps protect the flavour.

After the processing is done, the French Fries are bagged and/or boxed which is ready for final frying by immersing the frozen product in deep fat fryer at about 180℃ until the desired color and texture are achieved in both restaurant and home.

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