How to make snack pellets?

3D pellet snacks

Pellet Snack Production Process Overview

Pellet snacks are manufactured in a dried, semi-finished form that allows for convenient storage and transportation. In a secondary stage, these pellets are expanded, flavored, and packaged for final consumption.

Their unique ability to puff up is attributed to the presence of gelatinized or partially gelatinized starch within the structure. When the moisture trapped in the matrix is rapidly heated above its boiling point, it turns into steam, creating internal pressure. At the same time, the softened starch becomes less viscous, temporarily holding the steam inside and causing the product to expand.

As the product swells, it gradually loses moisture and becomes firm again. The outcome is a lightweight, crispy, and enjoyable snack.

snacks pellets

Key Benefits of Pellet Snack Technology:
  • More precisely shaped products compared to those expanded directly during cooking
  • Flexibility in raw materials: virtually any starch-based ingredient can be used
  • Versatile shaping options: including traditional die-cut, sheeted, layered, or multi-layered formats

A variety of cooking methods have been applied over time to transform raw starches and flours into pellet snacks. However, extrusion cooking stands out as the most effective, widely recognized, and commonly adopted technique worldwide.

In this process, forming extruders shape the cooked dough into pellets. This can involve direct die-cutting or producing sheets or ribbons that are shaped and cut away from the extruder.

For raw materials that are already pre-cooked—such as those based on potatoes—the cooking step can be skipped. This method of production is known as cold extrusion make snack pellets.

For other raw materials that require thermal treatment, the process begins with extrusion cooking, followed by shaping of the hot mass using either cold extrusion or other shaping technologies before the final drying stage.

double screw extruder AVN75

Different Ingredients, Different Results Make Snack Pellets

Starch is the essential component in all pellet snacks. This means that any flour containing starch can be processed by a pellet machine. Extrusion technology is highly adaptable, allowing various formulations that can significantly influence the final snack’s look, expansion behavior, and texture.

By adjusting the raw materials and processing conditions, one can control key product characteristics such as color, surface gloss or opacity, crunchiness, smoothness, bubble formation, or melt-in-the-mouth feel.

There are, however, a few restrictions:

  • Fat content: Fats act as lubricants, affecting both product stability (rancidity) and internal friction during processing.

  • Fiber content: Too much fiber can negatively impact texture.

  • Moisture levels: These are restricted by the technical limitations of the machinery.

Ideal Ingredients for Pellet Snack Production Include:

  • Various potato-based materials: flakes, granules, native and modified starches

  • Starchy root flours: such as yam, purple potato, and sweet potato

  • Corn and its by-products

  • Wheat and wheat-derived ingredients

  • Rice

  • Ancient grains

  • Legumes (used in controlled amounts)

Although pre-cooked flours are suitable for pellet production make snack pellets, they tend to be more costly. GEA’s processing lines are designed to work with both raw and pre-cooked materials, thanks to their optional integration of cooking extruders.

Functional Ingredients for Added Value

A functional snack is one formulated with specific components that provide additional health benefits, such as supporting wellness or helping prevent disease. These products focus more on nutritional value than simply being a snack.

Pellet snack technology supports the development of innovative recipes that meet specific dietary goals — such as high fiber content, multi-grain blends, or visually appealing multi-colored options.

Common functional ingredients include:

  • Protein-rich materials of plant origin

  • Milk-derived proteins

  • Protein concentrates or isolates

  • Whole grain flours rich in dietary fiber

This versatility allows for the creation of snacks with targeted health benefits, tailored textures, and appealing visual characteristics.

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