A binder for chickpea burgers is an essential ingredient that helps hold the burger together, preventing it from falling apart during cooking. In our chickpea patties recipe, we use a combination of a flax egg, corn flour, and the natural stickiness of the ground chickpeas and green peas. The flax egg, made from flaxseed powder and hot water, acts as a vegan substitute for a traditional egg, providing the necessary moisture and stickiness to bind the ingredients together. The coarse paste of chickpeas and green peas also contributes to the binding. Together, they create a firm yet moist patty that holds its shape well during cooking.