Laba porridge, also known as Babao porridge, is made of various ingredients in Laba Festival, and the folklore comes from Tianzhu [1]. China literati in the Southern Song Dynasty carefully wrote "Old Wulin Stories" and said: "Cooking porridge with walnuts, pine nuts, milk, persimmons and chestnuts is called Laba porridge."
Tang Lifu's Laba porridge poem: "The porridge on the eighth day of the twelfth lunar month comes from the Vatican Kingdom."
So it appeared no later than the Tang Dynasty.