Overview
Ring doughnuts are formed by joining the ends of a long, skinny piece of dough into a ring or by using a doughnut cutter, which simultaneously cuts the outside and inside shape, leaving a doughnut-shaped piece of dough and a doughnut hole from dough removed from the center. This smaller piece of dough can be cooked or added back to the batch to make more doughnuts. A disk-shaped doughnut can also be stretched and pinched into a torus until the center breaks to form a hole. Alternatively, a doughnut depositor can be used to place a circle of liquid dough (batter) directly into the fryer. Doughnuts can be made from a yeast-based dough for raised doughnuts or 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. Cake doughnuts are fried for about 90 seconds at approximately 190 °C to 198 °C, turning once. Yeast-raised doughnuts absorb more oil because they take longer to fry, about 150 seconds, at 182 °C to 190 °C. Cake doughnuts typically weigh between 24 g and 28 g, whereas yeast-raised doughnuts average 38 g and are generally larger when finished.
After frying, ring doughnuts are often topped with a glaze (icing) or a powder such as cinnamon or sugar. Styles such as fritters and jam doughnuts may be glazed and/or injected with jam or custard.
There are many other specialized doughnut shapes such as old-fashioneds, bars or Long Johns (a rectangular shape), or with the dough twisted around itself before cooking. In the northeast US, bars and twists are usually referred to as crullers. Doughnut holes are small spheres that are made from the dough taken from the center of ring doughnuts or made to look as if they are. These holes are also known by brand names, such as Dunkin' Donuts' Munchkins and Tim Hortons' Timbits. There are also beignets, which are square donuts topped with powdered sugar.
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