Working in batches carefully add the potatoes slices to the pot, making sure to return the heat to 300 degrees between each batch. Using a heat-proof spatula carefully turn the potatoes to cook them evenly. Cook them until golden brown and crispy, about 6-8 minutes per batch. Remove the chips from the hot oil with tongs or a spatula and place on the tray to cool or a plate lined with paper towel. Make sure to sprinkle on the powered vinegar and salt while the potato chips are still warm. The potatoes can be fried up to 4-6 hours ahead of time and kept at room temperature.