1. Rinse fish fillets and dry with paper towels. Season well with salt and pepper and dust with rice flour shaking off any extra. Set aside.
2. Place a wide, deep pan such as a Dutch Oven or large wok over medium heat. Add oil to a depth of at least 1 1/2 inches and bring to 350F degrees on a deep-fry or candy thermometer. (See Cook’s note below)
3. In a medium bowl, mix together the all-purpose flour, rice flour, baking powder and salt. Slowly stir in the vodka and beer to make a batter. Whisk gently. Don’t overwork the batter, a few lumps are okay. (If you over mix the batter, you’ll start to develop the flour’s gluten creating a more chewy crust). Place the batter in the refrigerator while preparing rest of recipe. Don’t make batter ahead of time as you’ll lose the bubbles from the lager which add an airiness to the batter).
4. Dip one fillet into batter to coat it completely. Hold by a corner and let excess batter drip into bowl, then lower into hot 350F oil. Repeat with the other fillets. Do not overcrowd the pan as the fish needs to have oil surrounding it without touching other fillets. When undersides of fillets are golden brown, after 1-2 minutes, turn and brown the other sides another minute or two. Lift from oil, drain on a plate lined with paper towels, then serve.
Cook’s Note: When frying fish, never crowd your pan and always make sure you bring the oil back to 350F before dropping in more fish. If it’s colder, you will end up with soggy, oily battered fish. If it’s hotter, you run the risk of burning the batter, cooking it faster than the fish. There is a magic temperature gap between 350F – 375F that will give you perfectly fried fish every time.