Pinolillos are made by grinding toasted corn and mixing it with various ingredients, such as cocoa, sugar, and spices like cinnamon. To prepare them, start by toasting the corn kernels until golden brown, then grind them into a fine powder. Combine the ground corn with your chosen flavorings, and you can serve it as a drink by mixing it with water or milk, or use it as a base for other dishes. Enjoy your pinolillos warm or cold!