Taste one of Yo-Yo's Big Bold Fried Chicken Sandwiches from 'Downright Delicious with Yo-Yo'.

Using a large bowl, mix half of the measurements of all dry ingredients together (saving the remainder to season the flour). Add the buttermilk and mix well. Place chicken thighs into the mixture making sure all the chicken is submerged into the marinade. Cover with plastic wrap and place in the refrigerator for 30 - 60 minutes.
Next, using a small bowl, mix the mayonnaise and siracha together and place in the refrigerator until you are ready to build the sandwich.
Next, place a cast-iron frying pan filled ¾ full with canola oil over medium high heat. While the oil is heating, season the all-purpose flour with the remainder of the same dry ingredients used for the marinade and mix well.
Using tongs, remove each piece of chicken from the marinade and let all the excess butter milk drip off. Dredge and coat the chicken with the seasoned flour, and place it in the hot oil and fry for 3-4 minutes on each side until golden brown.