Place pickle slices (32 Ounces) in a single layer on a few sheets of paper towel. Place paper towels on top, and dab up as much liquid as possible (important to get the batter to coat).
Heat 1" of oil on high in a heavy bottom pan (I use a skillet). I like to use a smaller pan for this so I don't need as much oil. Alternatively, you can use a deep fryer.
In a small bowl, combine whey protein (1/2 cup), xanthan gum (1 teaspoon), salt (1/2 teaspoon), baking powder (2 teaspoon), and cajun seasoning (1 teaspoon).
Use a rubber spatula to stir in soda water (6 tablespoons). The mixture will be wet, but don't worry, it will fry up beautifully!
Once the oil is hot, add pickles in batches so they aren't overcrowded in the pan. The pickles will look like they don't have much batter on them when you place them in the skillet.
Flip halfway through. You'll know the pickles are done once they're nice and golden.
Place fried pickles on a paper towel-lined plate, and continue until you've fried all the pickles.
Serve immediately (as with most fried food, these get soggy over time) with ranch, and enjoy!