Season the chicken: Season the chicken with the salt and garlic powder and arrange, skin side up, on a baking sheet, leaving space between pieces if possible. Refrigerate, uncovered, for 24 hours. Remove the chicken from the refrigerator and allow the chicken to come to room temperature.
Make the sriracha butter: In a small saucepan, melt the butter over low heat. Place the Sriracha sauce, lime juice, salt and sugar in a blender or food processor. Blend on high for 1 minute, adding the melted butter in a slow stream to create an airy, emulsified sauce. The sauce will keep in an airtight container in the refrigerator for up to 1 month.
Dredge the chicken: In a large bowl, whisk together the flour, cayenne pepper, salt, turmeric and coriander. Fill a 6-quart pot halfway with the oil and heat to 340°F. Dredge the chicken in the flour mixture, shaking off the excess, and place it on a clean baking sheet. Set a rack atop a rimmed baking sheet and set aside.
Fry the chicken: Working in batches, fry the chicken, turning occasionally, until evenly browned and the internal temperature reaches 165°F, 12 to 13 minutes. Drain the chicken pieces on the rack; serve hot or at room temperature, drizzled with the Sriracha butter.
Reprinted from Fried & True by Lee Schrager with Adeena Sussman. Copyright © 2014 by Lee Schrager. Published by Clarkson Potter/Publishers, a division of Random House, LLC. Photos this page: Evan Sung