01 - In a shallow dish, combine the flour, salt, black pepper, and paprika. Dredge each cube steak in the seasoned flour mixture, coating both sides evenly, and shake off any excess. Reserve 2 tablespoons of the seasoned flour for thickening the gravy later.
02 - Heat the vegetable oil and 1 tablespoon of butter in a large skillet over medium-high heat. Once the fat is hot and shimmering, carefully add the cube steaks. Sear for 2 to 3 minutes per side until a deep golden-brown crust forms. Transfer the 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, for 6 to 8 minutes until the onions are softened and the mushrooms are deeply browned and fragrant.
04 - Add the minced garlic and the reserved seasoned flour to the skillet. Stir continuously for about 1 minute to toast the flour and bloom the garlic, eliminating any raw flour taste.
05 - Slowly pour in the beef broth and Worcestershire sauce, stirring constantly and scraping up all the caramelized 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 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. Garnish with chopped fresh parsley and serve hot alongside mashed potatoes, rice, or egg noodles to soak up the gravy.