Pour oil into a deep fryer or large heavy pot and heat to 375 degrees F.
In a small bowl, mix together the flax seeds and water. Set aside. (This makes vegan flax egg). Let set aside for 10 minutes.
In a bowl, add the flour, sugar, baking powder, and salt. Whisk together.
After 10 minutes, add the dairy free milk, vanilla, and the flax egg. Whisk together just until combined. *You should have a thick pancake like batter. See video for a visual if needed.
Once your oil has come to temperature, add an oreo to the batter and coat both sides as much as possible.
Hold over the hot oil and carefully drop down. If needed, use a metal fork to lower.
Let cook for 1-2 minutes until golden and use tongs or a fork to carefully flip over to other side.
Very carefully, using tongs, remove to cooling rack or paper towel lined plate. Allow to cool for 5 minutes.
Repeat with remaining chocolate sandwich cookies. Should yield 15 fried oreos.
Top with powdered sugar once cooled. Best served immediately.