Scallion pancake, also known as green onion pancake, is a popular street food in Taichung. It is made by mixing flour, water, and chopped scallions, then pan-frying the mixture until crispy. Scallion pancake is often served with soy sauce or a dipping sauce made from soy sauce, vinegar, and chili oil. It is a simple yet flavorful snack that is loved by locals and visitors alike.