Julienned vegetables cook more evenly than chopped vegetables due to their uniform, thin shape, which allows for consistent heat penetration throughout each piece.
When vegetables are julienned, they are cut into thin, matchstick-like shapes. This uniformity in size and shape is crucial for even cooking. Because each piece is roughly the same thickness, heat can penetrate each vegetable piece at a similar rate. This prevents some pieces from being overcooked while others remain undercooked, a common issue with chopped vegetables, which often have varying sizes and shapes. The larger the variation in size, the more uneven the cooking will be. Julienning ensures a more consistent texture and doneness across all the vegetables in a dish.
To ensure truly uniform julienne cuts, use a mandoline slicer with a julienne blade. This will provide the most consistent results and save you time compared to cutting by hand.