Heat oil to a
depth of 2 inches in a saucier or other deep
sided pan. Slice onion into rings about 1/4
bowl, whisk together the flour, salt, pepper
and enough beer to make a dipping
consistency, such as thick pancake batter.
When oil has reached 375 degrees on a
deep-fry / jelly thermometer, dip onion
rings into batter and then carefully add to
hot oil, cooking 1-2 minutes total or until
rings on Fat Mat while you cook the rest.