Submerge the chicken breasts in pickle brine, cover, and refrigerate for 1 hour.
Remove chicken from brine, pat dry, then dredge in a mixture of flour, powdered sugar, and smoked paprika until fully coated.
Heat avocado oil in a large skillet over medium-high heat to 350°F / 175°C.
Fry the chicken for 6 to 7 minutes per side until golden brown and the internal temperature reaches 165°F / 74°C.
Rest the chicken on a wire rack for 5 minutes to keep the coating crisp.
Assemble each sandwich with a buttered toasted bun, fried chicken, and 2 pickle slices.