Peel brown skin from onions and cut into 1/8" slices; chill overnight to make them easier to separate into rings. Reserve inner rings for something else. Prepare batter: Mix flour, baking powder, sugar, Lawry's Seasoning Salt, and garlic powder.
Stir in 1 can (11 ounces) beer until batter is consistency of cream. Dip onion rings in milk and then in flour to cover completely. Heat frying oil to 365 degrees. Dip onion rings in batter and cook them in oil for 10 seconds. Lift basket and separate rings, then cook in oil again till golden brown, about 3 minutes. Drain, discard any broken rings. Salt and serve immediately.
Recipe Tips
Pro Tips for Perfect Onion Rings
Onion Selection and Prep
Choose firm, fresh Spanish onions
Cut uniform slices for even cooking
Remove any paper-thin membrane between rings
Chill rings overnight - don't skip this step!
Batter Tips
Keep batter cold
Don't overmix - some small lumps are okay
If batter thickens too much, add small amounts of cold beer
Test batter consistency: it should coat the back of a spoon but drip off slowly
Frying Tips
Maintain oil temperature between 360-370°F
Don't overcrowd the fryer - work in small batches
Use a spider strainer to separate rings during the first fry