Heat the oil to 350 degrees. Heat oven to warm.
Mix together the pancake mix and the spices. Whisk in the beer. The batter should be thick.
Slice the onions into ¾ inch thick rings and separate the rings.
Dip the rings in the batter and shake off the excess. Place into the oil. Work quickly and fill up the pan for each batch. Cook the rings for about 4 minutes, flipping once half way through so they can brown evenly on both sides.
Remove the rings with a slotted spoon and transfer to paper towels to drain. Transfer the rings to a wire rack on a cookie sheet and transfer to the onion to keep warm between batches.