Slice fish into rectangular fillets, roughly 6 inches by 2 inches. Remove skin if needed and pat dry with paper towels.
1 pound Halibut, skinless
Prepare your batter by adding 1/2 cup whole wheat flour, Old Bay, and egg to a shallow bowl. Stir a couple of times to break the yolk. Add beer and use a whisk or fork to combine until smooth. Set aside.
¾ cup whole wheat flour, 1 large egg, 2 tablespoons Old Bay Seasoning, 1 cup Lager or Pilsner beer
Add vegetable oil to a large pot or saucepan, so that the oil is about 3 inches deep. Turn your heat source up to medium and monitor the temperature of the oil with a kitchen thermometer. Your target is to get your oil to 375°F.
1 to 3 cups vegetable oil for frying
In a second shallow bowl, add 1/4 cup of whole wheat flour.
¾ cup whole wheat flour
Working with one fish fillet at a time, dip your fish into the flour first, coating completely. Then, take your flour-coated fish and dunk it into your beer batter, making sure you have an even layer of batter coating your fish.
Carefully drop your battered fish into the hot oil, frying for 4 minutes total. Use a skimmer or sieve to flip the fish after 2 minutes, to ensure an even cook. Repeat with all of your fish fillets, making sure to not overcrowd your oil—the battered fish will stick together if they get too close.
Carefully remove your fried fish from the oil and place it on a paper towel to absorb excess oil.
Serve immediately with lemon wedges.
Lemon wedges for serving