In a mixing bowl, whisk together flour, baking powder, salt, and any additional seasonings you like.
Slowly pour in 1 cup of beer, whisking continuously to avoid lumps. The batter should be smooth, slightly thick, and have a consistency similar to pancake batter.
Heat about 1 inch of oil in a deep skillet or frying pan to 350°F (175°C). You can check the oil’s readiness by dipping a small piece of batter in it—if it sizzles and rises, it’s ready.
Dip your food items (like fish fillets, chicken strips, or veggies) into the beer batter, coating them evenly.
Carefully place the battered items into the hot oil, making sure not to overcrowd the pan.
Fry until golden and crispy, about 3-5 minutes per side, depending on the thickness of your items.
Use a slotted spoon or tongs to remove each item from the oil. Place them on a plate lined with paper towels to absorb excess oil.
Serve hot with your favorite dipping sauce or alongside side dishes like fries or a fresh salad.