Ingredients:

2 skinless, boneless chicken breasts
Kosher salt and ground pepper
1 teaspoon paprika
Peanut oil, for frying
1 egg
1/2 cup milk
3/4 cup all purpose flour
1/4 cup whole-wheat flour
1 tablespoon dry milk
1 tablespoon powdered sugar
1/4 teaspoon baking soda
1/4 teaspoon dry mustard
1 sour pickle, cut into eight slices
4 soft hamburger buns, split
3 tablespoons unsalted butter, softened