The secret is in the recipe. You use 1 cup of flour and 1 cup of cornstarch plus 2 teaspoons baking powder.
Mix in small amounts of beer until you have the batter the consistency of pancake batter. Thick, but not too thick.
Stir until smooth , no lumps. Not too thin.
Cut the onion rings about 1/2 inch this. Place a few at a time in the batter, turning with tongs to coat them well.
I am joining Michael @ Design by Gollum for Foodie Friday