 Alternatively, a doughnut depositor can be used to place a circle of liquid dough (batter) directly into the fryer.There are two types of ring doughnuts, those made from a yeast-based dough for raised doughnuts, or those made from a special type of cake batter.Yeast-raised doughnuts contain about 25% oil by weight, whereas cake doughnuts' oil content is around 20%, but they have extra fat included in the batter before frying.