Sundae is a type of blood sausage in Korean cuisine. It is a popular street food in both North and South Korea, generally made by steaming cow or pig's intestines stuffed with various ingredients.
The sundae sausage dates back to the Goryeo period (918–1392), when wild boars, prominent across the Korean Peninsula, were used in the dish. Recipes for sundae are found in nineteenth century cookbooks including Gyuhap chongseo and Siuijeonseo.
Traditional sundae, cow or pig intestines stuffed with seonji (blood), minced meats, rice, and vegetables, was an indulgent food consumed during special occasions, festivities and large family gatherings. After the Korean War, when meat was scarce during the period of post-war poverty, dangmyeon replaced meat fillings in South Korea. Sundae became an inexpensive street snack sold in bunsikjip (snack bars), pojangmacha (street stalls), and traditional markets.