Yes, White Castle does make some of its products available for purchase in grocery stores. The brand has expanded its reach beyond just its restaurants by offering a selection of frozen items that are reminiscent of its signature menu items. These include frozen sliders that embody the classic taste of their beloved hamburgers. The availability of these products may vary by location and store, so it is advisable to check the frozen food section of local grocery stores to see if they carry White Castle sliders or other related products. Additionally, some grocery stores may have partnerships with White Castle, resulting in the presence of certain products in their offerings. For the latest information on available products and where to find them, it would be useful to check the current White Castle website or inquire with your preferred grocery retailer to find out if they stock these options.