In 1963, Dick Portillo invested $1,100 into a small trailer to open the first Portillo’s hot dog stand in Villa Park, Ill., which he called “The Dog House.” Years later, Portillo’s has grown to include more than 95 restaurants across 10 states. Portillo’s is best known for its Chicago-style hot dogs, Italian beef sandwiches, char-grilled burgers, fresh salads and famous chocolate cake.