01 - In a shallow dish, whisk together the all-purpose flour, kosher salt, black pepper, smoked paprika, and garlic powder until evenly combined.
02 - Coat each cube steak thoroughly in the seasoned flour mixture, pressing gently to adhere. Shake off any excess and set the steaks aside. Reserve the remaining seasoned flour for the gravy.
03 - Heat 2 tablespoons of vegetable oil in a large lidded skillet over medium-high heat until the oil shimmers. Working in batches to avoid crowding, sear the cube steaks for 2 to 3 minutes per side until deeply golden brown. Transfer the browned steaks to a plate and set aside.
04 - Reduce heat to medium and add the remaining 1 tablespoon of vegetable oil to the same skillet. Add the thinly sliced yellow onion and cook for 5 to 6 minutes, stirring occasionally, until soft and golden. Add the minced garlic and sauté for 1 additional minute until fragrant.
05 - Sprinkle 2 to 3 tablespoons of the reserved seasoned flour over the caramelized onions. Stir continuously and cook for 1 minute to toast the flour and remove any raw taste.
06 - Gradually pour in the beef broth and whole milk, whisking constantly to dissolve the flour and scrape up all the fond from the bottom of the skillet. Stir in the Worcestershire sauce and dried thyme. Bring to a simmer and cook for 3 to 5 minutes until the gravy begins to thicken slightly.
07 - Nestle the seared cube steaks and any accumulated juices back into the skillet, submerging them partially in the gravy. Cover with the lid, reduce heat to low, and simmer gently for 25 to 30 minutes until the steaks are fork-tender and the gravy has thickened to a rich consistency.
08 - Taste the gravy and adjust the seasoning with salt and pepper as needed. Garnish with freshly chopped parsley and serve hot over creamy mashed potatoes, steamed white rice, or buttered egg noodles.