Methods

To marinate the chicken

1. In a large bowl, combine the buttermilk, hot sauce, 1 1/2 tablespoons kosher salt, powdered Guntur Sannam chillies, jaggery, garlic powder and turmeric. Whisk together until the salt and sugar is dissolved. Add the chicken and stir to coat in the spiced buttermilk mixture. Cover and refrigerate for four hours to overnight.

For the spiced oil

1. Before you start frying the chicken, make the spiced oil. Add the desired amount of Sivathei chillies to a spice grinder and grind into a fine powder. Add a tablespoon of powdered Guntur Sannam chillies and pulse a couple times to combine. (see note in Introduction for Sivathei : Guntur Sannam chilli ratio for level of heat.)
2. Transfer the ground chillies to a medium bowl and mix with the garlic powder, salt, asafetida and brown sugar.
3. Heat the oil in a small saucepan until almost smoking. Pour the oil over the spices and let sizzle for a few minutes before stirring. Stir well and let sit while you cook the chicken. The spiced oil can be made a few days ahead and kept at room temperature.

To fry the chicken

1. Preheat the oven to 225°F. Prepare two baking sheets with a wire rack placed on each one and set aside.
2. Combine the all-purpose flour (or rice flour) and remaining 2 teaspoons of kosher salt on another rimmed baking sheet, mixing well. Remove the chicken from the refrigerator and transfer the chicken thighs to a plate, reserving the bowl of buttermilk marinade.
3. Take one chicken thigh and dredge it lightly in the seasoned flour mixture, shaking off any excess flour. Dip the floured chicken thigh back into the buttermilk marinade and then dredge it again in the flour. Transfer the breaded chicken thigh to the rack-lined baking sheet. Repeat with the remaining chicken thighs and then let sit at room temperature for 5–10 minutes (this will help the flour hydrate a little, creating crispy, craggy crust).
4. Heat a few inches of canola oil to 350°F in a cast iron skillet or dutch oven over medium high heat. Frying in batches, carefully place chicken in hot oil, taking care not to overcrowd pan. Fry the chicken for 3 minutes on one side, flip and fry for another 3 minutes. Flip the chicken again and fry until the internal temperature registers 165°F and the outside is golden and crispy, about another 1–2 minutes per side. Transfer the fried chicken thighs to the clean rack-lined baking sheet and place in the oven to keep the finished chicken warm. Fry the remaining chicken thighs.
5. To finish the the hot chicken, brush the spiced oil liberally on both sides of the fried chicken thighs.

To serve

1. Whisk together the lime juice and kosher salt in a medium bowl. Add the cucumbers and toss to coat.
2. Place a piece of white bread on a plate, top with a fried chicken thigh and a little extra spiced oil. Serve alongside the limey cucumbers.