The Complete Guide To Industrial Custard Cream Production: Achieving Smooth Texture And Consistent Quality

Custard Cream is a common emulsified sweet cream used in Western desserts, baked goods, and frozen foods, characterized by a delicate texture and rich aroma.

In home preparation, it is usually made through manual stirring and heating, whereas in industrial production, precise control of temperature, stirring, and time is required to maintain consistent taste, viscosity, and stability on a large scale.

The key to industrial production lies in scientific formula design, a well-controlled production process, and reliable custard cream making machines.

To efficiently and consistently produce high quality custard cream under industrial conditions, it is first necessary to understand its definition and composition. Only by knowing what custard cream is, what ingredients it contains, and what characteristics it has, can one better grasp the subsequent production principles and process control.

1. What Is Custard Cream?

Custard cream is a thickened sweet cream primarily made from milk, egg yolk or whole egg liquid, sugar, starch, and butter or vegetable fats. Through heating, starch gelatinization and protein denaturation occur, forming a stable structure. Custard cream is widely used as a filling for bread, profiteroles, and cake layers, as well as in various dessert sauces.

Main Ingredients of Custard Cream

• Milk: Provide the liquid base and determine the flow properties of the cream.

• Sugars: Impart sweetness and enhance overall taste and mouthfeel.

• Egg Yolk or Whole Egg Liquid: Contribute emulsification and structural strength.

• Starches (Corn Starch or Wheat Starch): Responsible for thickening and stabilizing the cream.

• Butter or Vegetable Fats: Add smooth texture and a glossy appearance.

• Vanilla Extract or Other Flavorings: Enhance flavor complexity and aroma.

2. Custard Cream Production Process

2.1 Raw Material Preparation

2.1.1 Liquid Ingredients

Milk: Add to a jacketed stainless steel mixing tank according to the specified ratio.

Heat to approximately 40–50°C to facilitate the dissolution of fats and sugar.

2.1.2 Fat Ingredients

Butter or Vegetable Fats: Soften or partially melt before adding.

Stir to fully disperse, forming a uniform emulsion.

2.1.3 Sugar and Starch

Granulated Sugar, Corn Starch, and other powdered ingredients should be pre-mixed to prevent clumping.

Slowly add to the liquid under stirring to ensure complete dissolution or uniform suspension.

2.1.4 Egg Yolk or Whole Egg Liquid

Use pasteurized liquid egg or egg yolk.

Add at the low-temperature stage to prevent premature coagulation of proteins.

Continue slow stirring after addition to form a uniform pre-mix.

2.1.5 Flavorings and Aromas

Vanilla Extract, Chocolate Paste, or Fruit Flavors should be added after heating to maintain stable aroma.

2.2 Heating and Gelatinization

• Start the jacketed heating system and gradually raise the temperature to 70–85°C.

• Stir continuously during heating to prevent localized gelatinization or sticking to the tank.

• Starch gelatinization and egg yolk denaturation occur simultaneously, gradually thickening the mixture and giving it a fine texture.

• Final viscosity depends on temperature and time; process parameters should be adjusted according to product requirements.

2.3 Mixing and Emulsification

• After gelatinization is complete, fats, proteins, and starches gradually form a stable emulsified network.

• Use a frame-type agitator to maintain low-speed uniform mixing, producing a smooth texture.

• Use a stainless steel mixing tank equipped with a high shear homogenizer mixer to achieve a higher degree of product fineness.

2.4 Cooling and Texture Stabilization

• Once the custard cream reaches the target viscosity, turn off the heating and start the jacketed cooling water circulation system.

• Slowly cool to approximately 35–40°C under stirring to prevent water separation and uneven texture.

• Continue cooling to the storage temperature (around 20–25°C) before discharging.

• Jacketed cooling ensures uniform temperature reduction throughout the mixture.

2.5 Quality Control

• Viscosity and Flow Testing: Check whether the thickness is stable.

• Color and Aroma Inspection: Ensure sensory consistency.

3. Industrial Production Key Control Points

3.1 Accuracy of Temperature Control

The texture of custard cream is primarily determined by the heating rate and target temperature. Excessive heat can cause coagulation, while insufficient heat results in incomplete gelatinization.

3.2 Mixing Intensity and Time

Insufficient mixing leads to a granular texture, while over-mixing can damage the system structure. Shear rate should be controlled via variable-speed stirring.

3.3 Homogenization Effect and Fineness

High shear homogenization improves product smoothness and uniformity, enhancing the emulsified network and overall quality. The process should be optimized to achieve the desired fineness without compromising system integrity.

3.4 Cooling Rate and Stability

Rapid cooling can lock in the target viscosity, but care must be taken to prevent condensation or water separation on the surface.

4. Conclusion

The industrial production of custard cream is a systematic process that relies on scientifically designed formulations and precise process control. Every stage—from raw material preparation and heating to mixing, emulsification, and cooling—directly impacts the final product’s smooth texture, rheological properties, and shelf-life stability.

By utilizing well-designed stainless steel custard cream mixing tanks, manufacturers can achieve a stable and efficient production process while maintaining consistent product quality.

IMMAY offers customized custard cream production equipment solutions, enabling clients to optimize manufacturing efficiency and product performance.

Contact IMMAY to learn more about advanced custard cream processing machines and tailored industrial solutions.