01 - In a shallow dish, combine the flour, salt, black pepper, and paprika. Dredge each cube steak through the seasoned flour, coating both sides evenly and shaking off any excess. Set aside 2 tablespoons of the seasoned flour for later use.
02 - Heat the vegetable oil and 1 tablespoon of butter in a large skillet over medium-high heat. Once the butter is melted and bubbling, carefully add the cube steaks. Brown for 2 to 3 minutes per side until a deep golden 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 for 6 to 8 minutes, 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 lightly toast the garlic.
05 - Slowly pour in the beef broth and Worcestershire sauce, stirring constantly while 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 browned 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 consistency.
07 - Taste the gravy and adjust the seasoning with salt and pepper as needed. Plate the steaks with a generous ladle of gravy and garnish with chopped fresh parsley before serving.