Instant Mix for Sizzler Sauce . Sizzler sauce is an adaptation of mildly spicy Japanese teppanyaki sauce. Teppanyaki is a post-World War II style of Japanese cuisine that uses an iron griddle to cook food. The word teppanyaki is derived from teppan, which means iron plate, and yaki, which means grilled, broiled, or pan-fried. Steak or meat or vegtables are cooked on hot iron plate with this sauce and the sizzling sound is dueto the water steaming on the hot iron griddle.