The primary ingredient in pancakes is flour. Typically, all-purpose flour is used to create the batter, which forms the basis of the pancake's structure. The flour is combined with other essential ingredients like eggs, milk, baking powder, and sugar to create a smooth batter. Once cooked, the flour provides the pancake with its characteristic texture and flavor, making it a popular breakfast dish enjoyed around the world. Variations can include whole wheat or gluten-free flours to cater to different dietary needs.