Egg waffle, known as "gai daan jai" in Cantonese, is a traditional Hong Kong snack. It is typically called "grid cake" due to its unique grid-like appearance. The waffle has a crispy texture and a slightly sweet taste. The batter is usually made from eggs, sugar, flour, and fresh milk, resulting in a delicate balance of crispiness and softness. It's commonly enjoyed with toppings like butter, condensed milk, or peanut butter.