First prepare the tartar sauce. Add all the ingredients in a bowl and mix until well blended. Put in the fridge and let cool until the fish and chips are ready
Add oil into a Dutch oven or large, deep frying pan. Heat the oil until it reaches 400 degrees. Cook the chips first, in batches, until they crisp. As each batch cooks, transfer the chips onto a large, paper-lined plate or pan, and season with salt each batch. Once each chip finishes frying, lower the heat so the oil’s temperature lowers to 350 degrees.
As the oil is heating up, prepare the batter. Season both sides of the fish with salt and pepper. In a large bowl, add all the dry ingredients and mix well. Slowly add the beer and whisk until a thick batter forms. If it is too thick to stir, slowly add more beer. It should resemble a thick pancake batter and slowly drip when pulling out the whisk
First dredge the fish into the flour until all its sides are coated evenly. Then place into the batter and coat all sides evenly as well. Add to the oil and cook until each side browns and crisps, about 7 minutes each side, then flip so the other side cooks as well. Depending the size of where you are frying, you can fit 3 to 4 pieces of fish. Set the fish on a wire cooling rack, with a paper towel lined baking sheet underneath the rack to absorb any dripping oil. Repeat the process until each piece of fish is cooked
Serve with the chips and the tartar sauce or, you can do as I did, and make a fat, fried fish sandwich