01 -
Pour oil into a heavy pot to a depth of about 2 inches. Heat over medium heat to 350°F, using a thermometer to monitor the temperature.
02 -
Whisk the flour, baking powder, sugar, and salt in a bowl. Add the egg, milk, and vanilla, then whisk until smooth and thick enough to coat a spoon.
03 -
Dip one Oreo at a time into the batter, turning to coat fully. Let the extra batter drip off for a second before frying.
04 -
Carefully lower 3-4 coated cookies into the hot oil. Fry for 1-2 minutes per side, turning once, until puffed and golden.
05 -
Transfer the fried Oreos to a rack or paper towel-lined plate. Dust with powdered sugar while warm and serve right away.