Note: You will need approximately 4 cups of oil to fry the donuts, but the amount will differ based on the size of your pan. You want at least 3–4" of oil depth. You can use canola or vegetable oil.
Place a cooling rack over top of a baking tray and set aside.
On a flat surface, lay out the biscuits. Cut out the center of each biscuit and then stretch each biscuit a bit wider (stretch by about ½").
Pour your frying oil into a large deep-sided pan and heat over medium-high heat. Use a candy thermometer to ensure you bring the oil to 350°F, for best results. Once oil is hot, fry each donut individually for about 1 minute per side, until they are golden brown.
Set each fried donut on the cooling rack to allow excess oil to drip off.
Sift the powdered sugar into a large bowl.
Whisk in the lemon juice.
Mix well until you get a smooth consistency.
Dip each donut into the lemon glaze.
Then place back on the cooling rack. Allow to sit until glaze is set, about 30 minutes.
I garnished my donuts with a little lemon zest for the photos. It was a tasty addition!