Pat the fish fillets dry with paper towels.
In a bowl, mix flour, baking powder, salt, and pepper.
Gradually whisk in the beer until smooth.
Heat oil in a deep pan over medium-high heat.
Dip each fish fillet into the batter, ensuring it's fully coated.
Carefully place the battered fish into the hot oil.
Fry for 4-5 minutes on each side until golden brown.
Remove the fish and place on paper towels to drain excess oil.
Serve hot with tartar sauce and lemon wedges.
Enjoy your delicious beer battered fish!