Heat oil in deep fryer or heavy skillet to 375°F.
Combine flour and 3 cups of Pabst Blue Ribbon beer in a bowl to create beer batter.
Preheat a skillet or griddle on medium heat.
Place corned beef in skillet, top with Swiss cheese and cover until cheese is melted.
Butter bread and place face down on skillet until browned.
Top bottom slice of bread with corned beef, cheese and sauerkraut. Spread dressing on remaining slice of bread and place on top of sandwich.
Dip sandwich in beer batter, covering it completely and use a spatula to transfer it to your deep fryer or heavy skillet.
Deep fry for three minutes or until sandwich is golden brown.
Slice sandwich in half, dip in dressing, and crack open a Pabst to drink along with it!