Add the chicken chunks to a large ziplocking bag. Add the pickle juice and milk. Seal the bag, and then squish to combine the contents. Place the bag in the refrigerator for 30 minutes, but up to two hours, to marinate.
Add peanut oil to a large, heavy bottomed skillet until it's about 1" deep. Heat until the oil reaches 350°.
To a large mixing bowl add the flour, bread crumbs, sugar, garlic powder, paprika, salt, baking powder, and pepper. Whisk together until evenly combined. Set aside.
Drain the liquid off the chicken, then add each piece of marinated chicken to the breading mixture- turning it to coat evenly and fully. Carefully add the coated chicken nuggets to the hot oil in the skillet. You many need to do multiple batches to prevent over crowding.
Cook the chicken for 3-5 minutes, turning as needed, until the chicken nuggets are crispy and a nice golden brown.
Using tongs, or a slotted spoon, transfer the crispy nuggets to a paper towel lined plate to drain off excess grease. Continue frying until all the chicken nuggets have been cooked.
Serve warm with your favorite dipping sauces, and enjoy!