Mix the flour, salt, and pepper in a large bowl.
Set aside for breading later.
In another bowl, blend buttermilk and water to create a smooth mixture.
This will help keep the chicken moist during cooking.
Dip each chicken tenderloin into the buttermilk mix.
Then, coat it thoroughly with the seasoned flour.
Repeat this for all tenderloins to form a good layer of breading.
Heat oil in a deep fryer or large pot to 350°F.
Carefully add the tenderloins in batches to prevent overcrowding.
Fry until golden brown and cooked through, about 5-7 minutes.
Remove the tenderloins from oil and place on paper towels to drain any excess oil.
Serve while hot.