I toss my chicken pieces into a bowl with the pickle juice, cover it, and pop it in the fridge. Thirty minutes works in a pinch, but I try to give it at least an hour, or overnight if I'm planning ahead. This step is what gives the chicken that unmistakable tangy Chick-fil-A flavor.
Once the chicken has marinated, I drain off the pickle juice completely. In a separate bowl, I whisk the egg and milk together until fully blended, then pour it right over the chicken pieces so every piece gets coated.
Next, I add flour, powdered sugar, paprika, salt, and pepper into a large ziplock bag and give it a shake to mix everything evenly. I drain the excess egg mixture off the chicken, drop the pieces into the bag, seal it, and shake until every piece is fully coated.
I pour peanut oil into a large skillet, enough to submerge the nuggets partway, and heat it over medium-high heat until it reaches about 350°F. Getting the temperature right here matters more than people think, so I always check it with a thermometer.
I add the coated chicken to the hot oil in small batches so the pan isn't crowded. Each batch takes about 3 to 5 minutes, and I flip the pieces halfway through so they turn golden brown and crispy on every side.
Once they're golden, I move the nuggets straight onto a paper-towel-lined plate to soak up any extra oil. I serve them warm right away, because that's when they taste best, with whatever dipping sauce my family is craving that day.