A pickling cucumber is a specific variety of cucumber that is ideal for making pickles. These cucumbers are typically smaller, thicker, and have a bumpy skin compared to regular cucumbers. Their firm texture and lower water content make them perfect for preserving, as they maintain their crunchiness even after the pickling process. Pickling cucumbers are often used in various recipes, including dill pickles and bread and butter pickles. They are usually harvested when they are young and green, ensuring the best flavor and texture for pickling. These cucumbers can be found in grocery stores or farmers' markets, especially during the summer months.