Combine ingredients for the wet batter / buffalo buttermilk marinade. Cover your mushrooms in the marinade and refrigerate for at least 30 mins.
Combine all the ingredients for the Vegan Ranch in a bowl and add to the fridge.
Combine ingredients for the dry batter in a bowl.
Heat up oil to 375° F either in an electric deep fryer, or a dutch oven / pot with a deep fry thermometer.
Once oil is up to 375° F, remove your mushrooms from the wet mixture, let excess marinade drip, then add them to the dry batter and coat thoroughly. Get every nook and cranny covered in flour. Then shake the excess off and repeat to double dredge. Carefully add to your oil.
Fry for a few minutes, flipping if necessary, until golden brown. Let them rest on a wire rack lined baking sheet.
Toast your buns and then assemble sandwich as follows from bottom to top: Ranch, Pickles, Lettuce, Chick'n, more Buffalo Sauce if you like, top bun.
ENJOY!