Start by preparing your chicken wings for the water bath.
They consist of three parts: tip, middle part, and the drumette (which looks like a small drumstick).
Separate each part by cutting at the joint in between them. It takes a bit of practice, but you can quickly tell if you're cutting wrong if you hit a bone and can't continue. The tip is not used for wings; I put them in a zip bag in the freezer to use when making stock, for example, along with chicken carcasses and vegetables.
Season the chicken pieces with salt and pepper and put them in a vacuum bag.
Place them as flat as possible so that they're not at different levels.
Vacuum seal the bag and place them in your water bath.
Cook the wings sous vide at 62 degrees Celsius (144 degrees Fahrenheit) for 1.5 hours.
The wings are ready to eat, but they still need some steps to become hot wings.
Find a container with a lid and put all the dry ingredients in it.
Mix them well, either with a fork or a spoon.
Pour the buttermilk into a jug.
Dip each drumette in the buttermilk and then into the container with the batter mixture.
When you're halfway through, put the lid on and shake the container hard to distribute everything evenly.
Repeat with the remaining wings.
Then coat them in a bit of flour/salt and they're ready for the fryer.
Fry them golden at 190 degrees Celsius (374 degrees Fahrenheit) - it takes about 2-4 minutes. Be careful not to add too many at once, as it lowers the oil temperature too much.
Take them out of the fryer and place them on absorbent paper.