In a shallow bowl, combine 2 cups flour, baking powder and seasonings. In another shallow bowl, combine eggs and 1 cup buttermilk. Dip each cubed steak in buttermilk mixture, then roll in flour mixture. Let stand for 5 minutes.
In a large skillet, heat 1/2 in. of oil on medium-high. Fry steaks for 5-7 minutes. Turn carefully; cook 5 minutes longer or until coating is crisp and meat is no longer pink. Remove steaks and keep warm.
Drain, reserving 1/3 cup drippings; stir remaining flour into drippings until smooth. Cook and stir over medium heat for 2 minutes. Gradually whisk in milk and remaining buttermilk. Bring to a boil; cook and stir for 2 minutes or until thickened. Serve with steaks.