Tenderize the steak with a meat mallet until about 1/2 inch thick.
Marinate the steak in buttermilk for at least 1 hour or overnight.
Mix flour, garlic powder, onion powder, paprika, salt, and pepper in a shallow dish.
Heat vegetable oil in a large skillet over medium-high heat.
Remove steak from buttermilk, letting excess drip off.
Dredge the steak in the flour mixture, ensuring an even coat.
Fry the coated steak in hot oil for 3-4 minutes on each side, until golden brown.
Transfer the fried steak to a paper towel-lined plate to drain.
In the same skillet, melt butter and whisk in remaining flour mixture.
Gradually add chicken broth, stirring until thickened. Serve over the steak.