As part of its research into calorie reduction and fibre enhancement, Campden BRI has successfully used food waste to double the fibre content of a tortilla, helping it achieve a ‘high fibre’ claim.

Project leader and bakery scientist Lucas Westphal, said: “We chose the tortilla for this project as its sales are continuing to rise significantly and therefore likely to have a real impact on people’s diets. The recipe we developed incorporated the butternut squash peel to boost its fibre content.

“On average, people in the UK do not consume enough fibre, and food waste is also a major concern for both consumers and the food industry. Consumers like familiarity, so producing a high fibre product that is similar to a well-known one holds potential as an effective route to increasing the public’s fibre intake.”

The team working on the project replaced 20% of the tortilla’s wheat flour with the butternut squash peel powder. This increased the fibre content by 97%, up from 3.3g to 6.5g per 100g, but only reduced calories by 3.5%. If marketed, the tortilla would now be eligible for a ‘high fibre’ claim making it more appealing to consumers interested in healthy eating.

“An ingredient’s functionality can modify both the finished product in appearance, texture and taste, and the behaviour of the product during manufacture.”

Adding the food waste ingredient also delivered another benefit. Bakery technologist Leandra Molina Beato, who helped reformulate the tortilla, explained: “Incorporating our butternut powder changed the colour of the tortilla. Colour plays a critical role in determining the consumer’s acceptance of a product, and our reformulation created a golden yellow tortilla, a food colour that’s generally accepted as appealing.

“There are many factors to consider when incorporating dietary fibre into a product. An ingredient’s functionality can modify both the finished product in appearance, texture and taste, and the behaviour of the product during manufacture. Trialling different fibres in different products is the only way to determine the impact on functionality and consumer appeal.”

Barfoots of Botley, provided the butternut squash peels as part of their sustainability work. Keston Williams, technical director, added: “The peel is currently used in our anaerobic digester, which produces electricity to run our factory and provides fertiliser for our crops. However, if the peel can be used for innovative healthy products like this, then this is the best place for it.”

The research is part of a three-year project which aims to provide the food industry with an understanding of the functionality of dietary fibres, their performance and potential new sources. Westphal added: “So far we’ve managed to successfully increase the fibre, but in this case calorie reduction has been minimal. We’ll continue to look at ways of achieving both goals over the next two years.”