01 - In a shallow dish, combine the flour, salt, black pepper, and paprika. Dredge each cube steak through the seasoned flour mixture, coating both sides evenly. Shake off any excess and set aside 2 tablespoons of the seasoned flour for the gravy.
02 - Heat the vegetable oil and 1 tablespoon of butter in a large skillet over medium-high heat. Once the butter is melted and foaming, add the dredged cube steaks in batches if needed. Brown for 2-3 minutes per side until a golden crust forms. Transfer the seared steaks to a plate and set aside.
03 - Reduce the heat to medium and add the remaining tablespoon of butter to the skillet. Add the sliced onions and mushrooms, cooking for 6-8 minutes while stirring occasionally until the onions are softened and the mushrooms are deeply browned.
04 - Add the minced garlic and the reserved 2 tablespoons of seasoned flour to the skillet. Stir continuously for about 1 minute to cook off the raw flour taste and coat the vegetables evenly.
05 - Slowly pour in the beef broth and Worcestershire sauce, stirring constantly and scraping up any browned bits from the bottom of the skillet. Pour in the whole milk and stir to combine. 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 and reduce the heat to low. Simmer for 20 minutes, or until the steaks are fork-tender and the gravy has thickened to a rich consistency.
07 - Taste the gravy and adjust the seasoning with additional salt and pepper as needed. Transfer the steaks to serving plates, spoon the onion-mushroom gravy generously over the top, and garnish with chopped fresh parsley. Serve immediately alongside mashed potatoes, rice, or egg noodles.