Dumplings can be cooked either on top or bottom heat; however this will depend on which way they were originally cooked/made (by hand or machine). Most dumplings have been created using one large piece of dough then cut into shapes using different sized knives; these cuts were then sealed together with flour paste – essentially making little bags – however some doughs are shaped by hand without flour paste – these types can be placed straight into an oven as they are larger than any hand made shapes/bags that have flour paste sealing them together (for example Chinese Spring Rolls).