In a large bowl mix 1 cup buttermilk and hot sauce. whisk well and set to the side
Wrap chicken breast in plastic wrap and tenderize with a mallet
Season breast with salt pepper and Cajun seasoning (optional)
Mix 1 cup of flour to 1/2 cup corn starch and 1 tbsp paprika
Dredge chicken breast in buttermilk mixture and then in flour mixture
Preheat oil in fryer or pan to med-high heat
Place breast in hot oil and cook 3-5 min per side until golden brown
Mix 1 1/2 tbsp of mayo with 1 tsp sriracha
Toast bun then coats bottom bun with mayo sauce. Add chicken breast and pickles