Pour some hot water 3-4 times over the duck skin to firm the skin up.
Add vinegar mixture in a heat proof container. Place it over hot water to dissolve the malt sugar. Thinly brush the skin with the vinegar mixture 2-4 times. Each time, you need wait for it to dry out before brush another layer of vinegar mixture.
Smear the marinade evenly over the duck meat. Let it dry out in the fridge for at least 12 hours without any covering
Preheat the oven 200°C/400°F. Wipe the marinade from the duck meat. Place the duck legs in oven. Roast it for 23-25 mins
Take the duck legs out from oven. Brush a thin layer of oil over the skin. Send it back to oven. Roast it 180°C/350°F for 8-10 mins. Enjoy
Video
Notes
Ingredients - Click to enlarge the imageTips1- If your duck legs are too big, then cut some slits on the meat side with scissors2- Be patient and careful to handling the duck skin if you want duck legs turn out perfect3- Don't let the marinade get onto the skin. Or it will have a brunt spot after roastedAir fryer cooking time and temperature:1-180°C/350°F 15-20mins2- Brush oil over skin. Air fry it 160°C/325°F for 5-8 mins