Place chicken in buttermilk. Refrigerate, covered, for 4 to 6 hours.
Stir together flour, salt and pepper in a shallow bowl. Dredge chicken in flour mixture until well coated.
In a separate bowl, combine all paste ingredients until well mixed. Microwave for about 15 seconds to make mixing easier, if desired. Set aside.
Heat oil, about 4 inches deep, in a cast iron skillet to 350 degrees.
Fry chicken, several pieces at a time, in oil until the temperature reaches 350 degrees. Using a spoon, immediately coat both sides of hot chicken with paste. The chicken will be very hot (temperature-wise), so use caution.
Serve on white bread with sliced pickles to help curb the heat.