What is shortening, and how is it made?

Shortening is a cornerstone ingredient in industrial baking and food manufacturing, valued for its ability to improve texture, volume, and stability in a wide range of products.

Unlike table margarine, which is formulated for direct consumption, shortening is primarily designed for functionality within doughs, batters, and frying applications. Its unique properties – such as plasticity, consistency, and heat stability – make it an essential tool for creating tender pastries, aerated cakes, crisp fried products, and smooth confectionery fillings.

In this article, we’ll explore what shortening is, how it’s made, and the equipment and processes that ensure consistent, high-quality results in industrial production.

Shortening is a semi-solid fat widely used in industrial baking and food manufacturing to improve texture, volume and shelf life in a wide range of products. By interfering with gluten formation, shortening creates tenderness and flakiness, resulting in baked goods that are soft, light, and consistent in structure.

Unlike margarine, shortening contains no water phase, and often no added emulsifiers or flavourings. This makes it a purely fat-based ingredient, valued for its stability, neutral flavour, and versatility across different formulations.

Common applications include:

• Puff pastry and laminated doughs: Shortening provides structure and flakiness, helping to create light, layered textures.
• Cakes, cookies, and pastries: Shortening enhances aeration and improves crumb softness, contributing to better volume and mouthfeel.
• Frying oils: Shortening offers excellent heat stability, allowing for consistent frying performance and extended oil life.
• Fillings and confectionery: Shortening ensures smooth, stable textures that maintain quality and appearance.

In industrial settings, the specific composition and physical properties of shortening are carefully engineered to meet the performance requirements of each product category – from high-plasticity pastry shortenings to fluid or all-purpose types used in continuous production lines.

Shortening is primarily made from vegetable oils and fats, though in some regions animal fats such as lard or beef tallow are still used – particularly for frying shortenings. To achieve the desired melting profile and functional properties, these fats may be hydrogenated or interesterified, allowing manufacturers to control texture, plasticity, and stability.

Key properties of shortening include plasticity, consistency, and stability at both room temperature and baking temperatures. These characteristics ensure that doughs and batters behave predictably during mixing, laminating, and baking, producing consistent quality in finished products.

Depending on the application, shortening may also include optional ingredients such as emulsifiers, antioxidants, or flavouring agents. These additions enhance stability, extend shelf life, and help maintain uniform performance across different product types.

A critical factor in shortening formulation is controlling the solid fat content (SFC). The SFC profile directly influences dough lamination, aeration, and final product structure, ensuring that pastries are flaky, cakes are tender, and fried products remain crisp and stable.

Producing high-quality shortening requires consistent process control at every stage of the process. Each step influences the final product’s consistency, plasticity, and functionality:

1. Oil blending and fat modification: Base oils and fats are combined and, if needed, hydrogenated or interesterified to achieve the desired melting profile and functional characteristics for the shortening.
2. Crystallisation and cooling: The fat blend is cooled under controlled conditions, using scraped surface heat exchangers (SSHEs), to form a stable crystal structure that determines texture and plasticity.
3. Plasticising and texturing: Machines such as pin rotor machines and plasticators knead and work the fat to promote crystal growth and achieve uniform texture, optimal plasticity, and consistent performance for the final product.
4. Additive incorporation: Emulsifiers, antioxidants, flavourings, or other functional ingredients are added and thoroughly mixed to enhance stability, shelf life, and application-specific properties.
5. Conditioning and resting: The processed shortening is allowed to rest so that the fat crystals stabilise, ensuring predictable behaviour in doughs, batters, or other industrial applications.
6. Packaging: Once fully conditioned, the shortening is packed, ready for shipment or direct use in production lines. Most shortening products are filled directly into bag-in-box systems or packed in blocks immediately after the crystallisation line. If conditioning or tempering is required, this process typically takes place after packaging to ensure the shortening achieves the desired texture and stability before use.

By managing each stage precisely, manufacturers ensure that shortening performs predictably in baked goods, frying applications, and other industrial uses.

You might also be interested in: What is industrial margarine, and how is it made?

In shortening production, temperature, pressure, and mechanical working all play a critical role in determining the final product’s texture and performance in baked goods. Precise control over these parameters ensures that the fat crystals form correctly, the plasticity is consistent, and the shortening behaves predictably during mixing, laminating, or frying.

Risks of improper crystallisation include graininess, uneven texture, and poor dough performance, which can compromise product quality and reduce production efficiency.

Modern crystallisation and processing equipment is specifically designed to maintain tight control over these variables. By regulating temperature, pressure, and mechanical shear throughout the process, these machines ensure consistent, high-quality shortening that meets industrial performance requirements.

Read more: Which crystallisation machine is right for your needs?

The shortening industry is evolving rapidly, driven by changing consumer preferences, regulatory pressures, and sustainability demands. Manufacturers face several key trends and challenges:

• Reformulation for health: Many producers are reducing trans fats and saturated fats in their formulations to meet health guidelines and consumer expectations without compromising functionality.
•  Sustainable sourcing: There is a growing emphasis on plant-based oils and responsibly sourced ingredients in the shortening industry, which requires flexibility in processing to handle different  fat compositions.
• Energy efficiency and CO₂-based cooling: Modern production lines are increasingly adopting CO₂ refrigeration and other energy-efficient cooling solutions to reduce environmental impact and operating costs.
• High-volume production with consistent quality: Industrial shortening production must meet rigorous quality standards while maintaining reliability, speed, and uniform performance across large batches.

Addressing these challenges requires precision equipment and process expertise, ensuring manufacturers can innovate, remain compliant, and maintain operational efficiency.

Gerstenberg Services provides a comprehensive suite of equipment and solutions designed specifically for shortening production, helping manufacturers meet both operational and market demands.

The Polaron Scraped Surface Heat Exchanger (SSHE) ensures controlled crystallisation, while the Pin Rotor Machine and optional Plasticator deliver consistent plasticity and texture. For research, development, and small-scale trials, the Polaron Margarine Pilot Plant allows formulation testing and optimisation before scaling up.

All equipment is designed for industrial-scale production while meeting the highest standards of hygiene. Adjustable processing parameters and flexible configurations allow producers to adapt to different fat compositions, recipes, and production volumes.

Gerstenberg Services offers ongoing technical support and preventive maintenance plans, ensuring reliable operation, minimal downtime, and consistent output even in high-capacity, 24/7 production environments.

By combining advanced processing equipment with expert service and support, we help manufacturers address industry trends and challenges, enabling efficient, sustainable, and high-quality shortening production.