Absolutely you can make ghee with cultured butter. Same as usual - heat till melted by any method, then pour off the ghee (I usually strain this, too, since I really need to avoid the milk solids).
Your continued loss is fantastic! And much faster than mine, lol.
5'4" 39yo mother to five sweeties & married to their AMAZING DaddyGrok
*Current Weight: 175lb__________________________________*Goal: 135lb
*Deadlift: 225x4________________________________________*Back Squat: 165lb
*Bench: 125x2_________________________________________*Pre ss: 85lb
***Winning a 20-year war against binge eating disorder***