Frying biscuit dough is the quickest way to hot homemade doughnuts. This recipe is amazingly simple, yet produces some of the most awesomely delectable fried doughnuts that are serious contenders to those of the major doughnut chains. (Our "Hot Doughnuts" sign is always on.) As more is merrier, I'll provide y'all with two ways to "doughnut": classic glazed and classic jelly-filled (i.e. sufganiyot). Bring on the fresh hot doughnuts. Enjoy, y'all.
Remove biscuit dough from can and separate onto a piece of parchment paper or a lightly floured surface. Let sit at room temperature for 30-45 minutes, or until biscuits are no longer chilled/reach room temperature. For classic glazed doughnuts: Poke a hole in the center of the biscuits with the handle of a wooden spoon or tip of a funnel and stretch out slightly to create a larger hole.
Pour about 2 1/2 -inches of oil into a large sauce pan or Dutch oven; clip a deep-fry/candy thermometer to the side of the pot. Heat over medium-high heat until temperature reaches 365°F. Line a plate or sheet pan with paper towels.
Cook biscuits for about 1 1/2 minutes, or until golden-brown, turning once. Remove from oil with a slotted spoon and drain on the paper-towel lined plate.
For classic glazed doughnuts: Mix approximately 2 cups of confectioners sugar with 1/4 cup of milk or water and 1 teaspoon of vanilla (optional) in a shallow bowl. When the doughnuts are cool enough to handle, but still warm, dip into the glaze and flip to cover both sides. Transfer to a wire rack to allow glaze to harden.
For classic Jelly-Filled Doughnuts: Fit piping bag with a medium star tip. Fill bag with jelly/preserves. Poke a hole in the side of each doughnut with a paring knife; fill with preserves and let cool before dusting in confectioners sugar. If you don't have a piping bag or pastry tips, you can use a squeeze bottle instead.
Chocolate variation: Heat 1/4 cup heavy whipping cream in a small saucepan over medium heat until bubbles appear around the edge of the pan. Stir in 1/2 cup semisweet chocolate chips until melted and smooth. Dip tops of doughnuts in glaze and decorate with desired toppings.