It took me approximately 15 minutes to make ghee from 2 lbs of butter. Making 1lb of butter takes about 9-10 minutes. Though the times are provided, I would strongly recommend that you focus more on the visual cues rather than the clock because depending on the quality and temperature of the butter, cooking times may vary.
From www.facebook.com/groups/InstantPotCommunity/permalink/165...
"I refuse to pay $4 a gallon for Fairlife, but i cant scald the milk without it sticking to the bottom of the pot, so I've done this once a week for the past year. Never had it fail."