Tenderize cube steaks with meat mallet or lightly with a knife. Season steaks with salt and pepper.
Mix salt, pepper, garlic powder and flour in a large shallow bowl and dredge steaks.
In a large skillet over medium high heat, heat vegetable oil. Fry steaks in batches so they don’t touch until golden brown, about 3 - 4 minutes per side. Transfer steaks to a paper towel-lined plate.
Reduce heat to medium and add butter to skillet. Melt, scraping the bottom of the pan. Then add cornstarch and stir to coat. Slowly add beef broth, ½ a cup at a time, continuously stirring.
Let simmer until gravy has thickened. Taste and season with salt and pepper.