In a medium bowl, whisk together the flour, baking powder, salt, and pepper.
2 large onions
Gradually whisk in the chilled beer until a smooth, thick batter forms. It should be the consistency of pancake batter.
2 large onions
Heat the vegetable oil in a large, deep skillet or Dutch oven over medium-high heat to 375°F (190°C).
2 large onions
Dip each onion ring into the batter, ensuring it is fully coated. Let excess batter drip off.
2 large onions
Carefully place the battered onion rings into the hot oil, working in batches to avoid overcrowding the pan. Fry for 2-3 minutes per side, until golden brown and crispy.
Remove the onion rings from the oil with a slotted spoon and drain on paper towels.
Season immediately with additional salt and pepper if desired. Serve hot.
Notes
These are best served immediately after frying for maximum crispiness.