Researchers at Heriot-Watt University in Edinburgh are pioneering a method to reduce the saturated fat content in sausage rolls, a beloved British snack, without sacrificing the flaky texture that consumers cherish. Given that approximately 10 to 15 million sausage rolls are sold weekly in the UK, this innovative approach could have significant implications for public health.
Addressing Saturated Fat Concerns
Sausage rolls, while popular, often contain a staggering amount of saturated fat—sometimes exceeding 60% of the daily recommended intake for adults. With rising health concerns associated with high saturated fat consumption, particularly its links to cardiovascular disease, this research is timely. The team at Heriot-Watt aims to modify the pastry formulation to create a healthier alternative that maintains the characteristic taste and texture.
Professor Stephen Euston, who leads the project at the university’s School of Engineering and Physical Sciences, expressed the importance of retaining the qualities that make sausage rolls enjoyable. “We want to lower the level of saturated fat while keeping the taste and texture that people love,” he stated. The researchers believe that their findings could extend beyond sausage rolls to include other pastries such as croissants, Danish pastries, and both sweet and savoury turnovers.
The Science Behind Oleogelation
At the heart of this research is a process known as oleogelation, which allows the substitution of solid fats with healthier liquid oils, such as sunflower and rapeseed oils. This technique transforms these oils into a “solid-like fat” that can mimic the properties of traditional fats essential for achieving the pastry’s flaky structure.
Professor Euston elaborated on the complexities involved: “Making flaky pastry is surprisingly complicated. The fat is not just there for flavour; it plays a crucial structural role in the pastry.” The researchers are keenly aware that simply replacing solid fat with liquid oil would not yield the desired flaky outcome, as liquid oils lack the necessary structure to separate the layers of dough effectively.
Environmental Considerations and Benefits for Bakers
In addition to improving public health through reduced saturated fat content, the research team is prioritising the use of oils derived from crops that can be cultivated in the UK. This focus not only addresses health concerns but also aims to minimize environmental impact, aligning with wider sustainability goals in the food industry.
Moreover, the potential benefits extend to bakers as well. Traditional laminated pastries often require frequent chilling during production to prevent the fat from melting. Professor Euston noted that their oleogels could remain stable at higher temperatures, possibly eliminating the need for extensive chilling processes. “If we are lucky, they might not need to chill it at all,” he remarked, hinting at possible efficiencies in production.
Collaborative Efforts and Future Implications
This ambitious project, funded by the UK Research and Innovation Engineering and Physical Sciences Research Council (UKRI EPSRC), is set to run for ten months. The researchers are collaborating with industry partners, including New Food Innovation and AB Mauri, to transition their laboratory findings into practical applications. Dr. Andrew Bourne, executive director for innovation and partnerships at UKRI EPSRC, highlighted the project’s aim to transform innovative food science into solutions that enhance public health: “By taking promising research out of the lab and testing it with everyday consumers, it has the potential to make the nation’s favourite snacks healthier and make a genuine difference to our health and wellbeing.”
Additionally, the team is exploring whether the same oleogelation technology can be applied to reduce saturated fat in vegan cheese alternatives, further broadening the impact of their research across various food categories.
Why it Matters
The findings from Heriot-Watt University could herald a significant shift in how processed snacks are formulated, particularly in the realm of health and nutrition. By addressing the saturated fat content in popular pastries, this research not only stands to improve individual health outcomes but may also encourage a broader movement towards healthier eating habits in the UK. As public awareness of nutrition grows, such innovations will be vital in aligning consumer preferences with health goals, ultimately leading to a healthier population and reduced healthcare costs associated with diet-related illnesses.
