Is zucchini apple butter or zucchini jam a safe product?
At present, there has been no research to determine the safety of these products or to establish a processing time. Because they are made with a low-acid vegetable rather than acid fruit, they may not be acid enough for safe processing in a boiling-water canner. If made, these products should be stored in the refrigerator and used in several weeks or in the freezer and used in several months.
Barbara Willenberg, Nutritional Sciences, University of Missouri-Columbia
Last update: Tuesday, May 05, 2009