Ingredients:
1 cup vegetable oil 
1 8-count package large refrigerated biscuits (such as Pillsbury Grands)
1/2 cup sugar
1/2 teaspoon ground cinnamon
confectioners sugar, icing, sprinkles, etc (optional)
Directions:
Heat 3/4 cup of the oil in a medium skillet or pot over medium-low heat.Place the biscuits on a cutting board. Using a 1-inch round cookie cutter or shot glass, cut a hole in the center of each biscuit, reserving the extra dough for "holes."
Test the heat of the oil by dipping the edge of a doughnut in the pan. When the oil is hot enough, the edge will bubble. Place 4 of the doughnuts and holes in the skillet and cook until golden brown, 1 to 1½ minutes per side. Transfer to a wire rack or paper towel–lined plate to drain. Add the remaining oil to the skillet, reheat, and cook the remaining doughnuts and holes.
In a large bowl, combine the sugar and cinnamon. Gently toss the warm doughnuts in the mixture. Toss or top with any additional toppings (vanilla, chocolate frosting, confectioners sugar, etc.) Serve warm or at room temperature.
(makes 8 doughnuts, plus holes)
(adapted from realsimple.com)
