From his Flemish training he retained an accurate precision in the description of details and qualities, both in animals and fruits or other foods. The Italian influence reveals itself in the bright Italian light, which he often tempered by the use of chiaroscuro. He painted large and ambitious compositions similar to those he had seen in the workshops of Antwerp and in the studio of his master Fyt while at the same time developing a personal language of almost naive charm. Some of his compositions are in the very dynamic Flemish Baroque style of still life painting. An example of this is "" (Collection of Burghley House, Lincolnshire, England), which represents a dynamic whirlwind of violence. At the same time he produced peaceful compositions, such as the "" (Auctioned at Setdart Subastas). His compositions use zigzags to create dynamic effects, while objects accumulate without any clear form. Jacob van der Kerckhoven moved away from Fyt's style and developed a personal manner characterized by analytical drawing and brilliant colour. He used very oily paint and was highly skilled in rendering the play of reflections. His works shows stylistic links with Michelangelo Cerquozzi and Michele Pace del Campidoglio. Contact with the work of Giovanni Battista Ruoppolo and also with Joseph Heintz the younger are reflected in his still-life paintings with fish as well as in the "" (Uffizi, Florence), a rare example of his figure painting. There exist doubt as to whether certain works (such as the "Still life with fruit", Lower Saxony State Museum, Hannover) were painted by him or by Giuseppe Recco. Jacob van der Kerckhoven is known to have collaborated with figure painters such as Johann Carl Loth and Antonio Zanchi on compositions to which he contributed the still-life elements.