Japanese-style panko bread crumbs are widely popular in the global food industry for their crispy texture, low oil absorption, and fluffy appearance. Compared with traditional fermented bread crumbs made from baked bread, the twin-screw extrusion production process is more efficient, cost-effective, stable, and suitable for large-scale commercial mass production. It has become the mainstream production technology for modern panko bread crumbs factories worldwide.
This article shares the complete commercial production workflow of extruded Japanese panko bread crumbs, including raw material formula, step-by-step processing technology, key control points, and final quality standards, which is fully applicable to food factory production guidance and industry technical introduction.
1. Commercial Raw Material Formula
The extruded panko formula requires no yeast, no fermentation, no sugar, and no oil, ensuring a pure white color, stable texture, and long shelf life. The standard industrial formula is as follows:
- All-purpose flour: 70%
- Corn starch: 20%
- Rice flour: 10%
- Purified water: 30%–32% (adjusted according to ambient temperature and humidity)
- Food-grade leavening agent: Optional (for lighter and fluffier texture)
This formula simulates the flaky and needle-shaped structure of authentic Japanese panko, with low oil absorption and strong crispy performance after frying.
2. Full Twin-Screw Extrusion Production Process
The entire production line adopts automatic continuous operation, with zero waste and high yield. The complete process steps are listed below in production order:
Step 1: Raw Material Batching and Automatic Feeding
Weigh flour, corn starch, and rice flour strictly according to the standard formula. The mixed dry powder is transported dust-free to the high-speed mixer through an automatic feeding system, avoiding manual errors and ensuring batch consistency.
Step 2: High-Speed Mixing and Humidification
The dry powder is fully blended in a horizontal mixer, and quantitative water is sprayed evenly during the mixing process. The materials are stirred into uniform wet granular materials with consistent humidity, no dry powder agglomeration, and no excess water, meeting the extrusion processing standards.
Step 3: Twin-Screw Extrusion and Instant Gelatinization (Core Process)
The uniform wet materials are conveyed into the twin-screw extruder. Through segmented temperature control and high-pressure shear inside the barrel, the materials achieve instant high-temperature gelatinization and mild expansion. The whole process completes curing in one step without fermentation or baking. The temperature of the extruder barrel is controlled between 80°C–120°C to ensure full curing while preventing yellowing and scorching of the materials. The materials are extruded into uniform strip-shaped materials through customized molds.
Step 4: Rotary Cutting and Primary Shaping
The strip materials extruded from the die head are cut into fixed-length strips by high-speed rotary cutters. The cutting length can be adjusted freely according to product requirements to produce 3mm–8mm needle-shaped and flaky semi-finished products.
Step 5: Air Cooling and Stereotype
The cut semi-finished products are transported by the air cooling conveyor to dissipate surface water vapor and residual heat. After natural cooling, the material texture becomes tough and stable, which avoids excessive crushing and powder residue during the subsequent granulation process.
Step 6: Professional Granulation and Panko Forming
The cooled strip materials are sent to a special bread crumb granulator. Through physical tearing and shaping, the materials are processed into Japanese-style needle-shaped, snowflake-shaped and flaky panko particles. The particle size is uniform, the structure is fluffy, and the appearance is close to imported authentic panko.
Step 7: Multi-Layer Mesh Belt Low-Temperature Drying
Drying is the key process to determine the shelf life and taste of panko. The granulated bread crumbs enter the continuous mesh belt dryer, with the drying temperature stably controlled at 60°C–75°C. After uniform hot air drying, the water content of the finished product is reduced to 8%–10%. Low-temperature drying ensures pure white color, no yellowing, crisp texture, and effective mold and moisture prevention.
Step 8: Vibration Screening and Grade Classification
The dried bread crumbs are screened by a multi-layer vibrating sieve to separate standard finished particles, oversized particles, and fine powder. The fine powder and unqualified particles are automatically returned to the mixing system for re-extrusion, realizing 100% material utilization and zero production waste.
Step 9: Iron Removal and Metal Detection
To meet food safety standards, the finished panko passes through a magnetic iron remover and a high-precision metal detector in sequence. All metal impurities and foreign substances are eliminated to ensure product safety and compliance.
Step 10: Automatic Weighing and Packaging
Qualified finished panko is automatically weighed and packaged into 1kg, 5kg, 25kg commercial packaging specifications. Nitrogen filling packaging can be equipped to isolate oxygen and moisture, extending the shelf life to 12 months under normal temperature.
3. Core Production Key Points
- Segmented temperature control of the extruder is essential to keep the panko pure white without yellow spots.
- Low-temperature slow drying is strictly required to avoid hard texture and color deterioration.
- Closed-loop recycling of fine powder reduces production costs and improves yield.
- Adjustable mold and cutting speed can produce multiple panko types to meet different market demands.
4. Final Product Quality Standard
- Moisture content: 8%–10%
- Particle size: 3mm–8mm (customizable)
- Color: pure white or milky white, no scorch marks or yellow spots
- Oil absorption rate: ≤18%, low oil absorption, non-greasy after frying
- Shelf life: 12 months (nitrogen-filled packaging)
5. Process Advantages of Twin-Screw Extruded Panko
Compared with traditional baked fermented panko, the twin-screw extrusion process has obvious advantages: shorter production cycle, fully automatic continuous production, no waste bread crust, lower production cost, more stable product quality, and diverse product shapes. It is the best production solution for commercial fried food factories, catering suppliers, and bulk wholesale panko products.