I made these the other day and HOLY SHIT. They were so good!
This is the recipe I used:
I didn't have a cooking thermometer so I just winged it. I turned my burner to about 7, so the higher side of medium and then waited about 6 or 7 minutes for the oil to get hot. I then put my onion rings in there, I did a few at a time, and then waited until they were slightly browned and then turned them, then waited until they were a little darker than golden brown and took them out and sprinkled with salt. I tried the way the recipe said and when I did it for 2 minutes on each size I had REALLY done onion rings, probably because I didn't know for sure how hot my oil was. I also used Blue Moon Winter Abbey Ale. OMG, they were amazing. Here's some photos!