University of Illinois Researchers Develop Microwave-Frying Method to Reduce Oil in French Fries

Researchers at the University of Illinois have developed a method to cook french fries using less oil while maintaining their crispiness and taste. The technique combines traditional frying with microwave heating. This approach reduces the amount of oil absorbed by the fries during preparation.

French fries typically absorb oil during frying, leading to high fat content. In the frying process, water in the potato pores initially prevents oil entry, but as water evaporates, oil penetrates the food. Frying cooks from the outside in, which contributes to this absorption.

Microwaving, by contrast, cooks from the inside out. Using microwaving alone results in a mushy texture without crispiness. The researchers combined the two methods to achieve a crispy exterior through brief traditional heating followed by microwave completion.

The study proposes integrating both heating methods in a single device.

Traditional heating provides crispness, while microwave heating reduces oil consumption. The resulting fries maintain taste, texture, and feel but absorb less oil and fat. The findings were published in Current Research in Food Science and The Journal of Food Science.

Pawan Singh Takhar, author of one of the studies, noted that high oil content adds flavor but also contributes energy and calories. He stated that consumers often prioritize cravings over health at the time of purchase.

“Consumers want healthy foods, but at the time of purchase, cravings often prevail.”

Frying is considered a less healthy cooking method due to fat absorption from oils. The research focuses on reducing harm from fries, which remain popular despite their fat levels. This method aims to offer a healthier alternative without altering the sensory qualities that make fries appealing.

The technique requires a custom-built device combining frying and microwaving, which is not currently available as a standard kitchen appliance. Home replication may not be feasible in the near term. Further development could lead to commercial applications in food preparation.