Founded in 1921, White Castle is a family-owned, privately held chain of over 350 fast-food restaurants in nearly 10 U.S. states. The chain s restaurants serve a range of burgers, sandwiches and side dishes. Its restaurants provide frozen cheeseburgers and hamburgers. White Castle also offers recipe books. The chain s restaurants serve side dishes, such as cheese sticks, onion chips and chicken rings. Its restaurants provide mugs, ornaments, blankets, key holders, stainless steel coffee tumblers and aprons. In addition, the chain s restaurants offer promotional coupons, wallpapers and greeting items. White Castle offers gift cards of several denominations. The chain sells more than 500 million burgers every year.