This Hong Kong-style egg waffle, also known as gai daan jai, is a popular street food that features a crispy exterior and a soft, fluffy interior. The batter is made with a combination of flour, eggs, sugar, and evaporated milk, resulting in a sweet and delicate flavor. These waffles are cooked in a special egg waffle pan, creating a unique bubble-like appearance that's both visually appealing and fun to eat.