Heat oil in cast iron skillet until >350F.
Large Bowl (Drys): Add flour, baking powder, crushed saltines, and salt/pepper to taste. Mix.
Small Bowl (Wets): Whisk egg and milk.
Dredge cube steak in the drys. Then wets. Then back to drys. When coated, introduce to oil.
Fry for about 10 minutes, flipping halfway if shallow.
Let cool on wire rack, top with gravy and garnish with parsley.