Yes, vinegar-based pickles should be stirred regularly, especially during the initial fermentation period, to ensure even distribution of brine and prevent mold growth.
Stirring vinegar-based pickles is crucial for several reasons. First, it helps to evenly distribute the brine, which is essential for proper fermentation and preservation. The brine contains salt and vinegar, which inhibit the growth of undesirable bacteria and molds. Without regular stirring, some pickles might not be fully submerged in the brine, increasing the risk of spoilage. Second, stirring helps to release any trapped gases, such as carbon dioxide, produced during fermentation. These gases can create pockets that prevent the brine from reaching all parts of the pickles. Finally, stirring helps to prevent the formation of a Kahm yeast layer on the surface of the brine. While Kahm yeast is generally harmless, it can affect the flavor and texture of the pickles. Regular stirring disrupts its formation and keeps the brine clean. For the first few days of fermentation, stir the pickles at least once or twice a day. After that, you can reduce the frequency to every other day or so.
When stirring, use a clean, non-reactive utensil like a wooden spoon or a stainless steel spoon to avoid introducing unwanted flavors or bacteria to the pickles.