01 - In a shallow dish, combine the flour, salt, black pepper, and paprika. Dredge each cube steak through the seasoned flour mixture, coating evenly, and shake off any excess. Set aside 2 tablespoons of the seasoned flour for later use in the gravy.
02 - Set a large skillet over medium-high heat and add the vegetable oil along with 1 tablespoon of butter. Once the fat is hot and shimmering, carefully place the dredged cube steaks in the skillet. Sear for 2 to 3 minutes per side until a deep golden crust forms. Transfer the browned steaks to a plate and set aside.
03 - Reduce the heat to medium. Add the remaining tablespoon of butter to the skillet along with the sliced onions and mushrooms. Cook, stirring occasionally, until the onions have softened and the mushrooms are nicely browned, about 6 to 8 minutes.
04 - Add the minced garlic and the reserved 2 tablespoons of seasoned flour to the skillet. Stir thoroughly to combine and cook for 1 minute to toast the flour and bloom the garlic.
05 - Slowly pour in the beef broth and Worcestershire sauce, stirring constantly and scraping up any browned bits from the bottom of the skillet. Stir in the milk and bring the mixture to a gentle simmer.
06 - Return the seared cube steaks to the skillet, nestling them down into the gravy. Cover the skillet with a lid, reduce the heat to low, and simmer for 20 minutes until the steaks are fork-tender and the gravy has thickened to a rich, coating consistency.
07 - Taste the gravy and adjust the seasoning with additional salt and pepper if needed. Transfer the steaks to serving plates, spoon the onion-mushroom gravy generously over the top, and garnish with chopped fresh parsley.