01 - In a shallow dish, whisk together the flour, salt, black pepper, paprika, and garlic powder until evenly combined. Reserve the dish for dredging.
02 - Pat each cube steak dry with paper towels. Dredge each piece thoroughly in the seasoned flour, pressing gently to adhere the coating. Shake off any excess and set aside. Retain the leftover seasoned flour in the dish for later use.
03 - Heat 2 tablespoons of vegetable oil in a large skillet over medium-high heat until shimmering. Working in batches to avoid crowding, add the dredged cube steaks and sear for 2 to 3 minutes per side until golden brown. Transfer the browned steaks to a plate and set aside.
04 - Reduce heat to medium. Add the remaining 1 tablespoon of oil to the same skillet. Add the thinly sliced onions and cook for 5 to 6 minutes, stirring occasionally, until softened 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 onions. Stir continuously and cook for 1 minute to toast the flour and eliminate any raw taste.
06 - Gradually pour in the beef broth and milk while whisking constantly, scraping up all the browned bits from the bottom of the skillet. Stir in the Worcestershire sauce and dried thyme. Bring to a gentle simmer and cook for 3 to 5 minutes until the gravy begins to thicken slightly.
07 - Return the seared cube steaks and any accumulated juices back into the skillet, nestling them into the gravy. Cover with a lid, reduce heat to low, and simmer gently for 25 to 30 minutes until the steaks are fork-tender and the gravy has fully developed its flavor.
08 - Taste the gravy and adjust seasoning with salt and pepper as needed. Garnish with freshly chopped parsley. Serve hot over mashed potatoes, steamed rice, or buttered egg noodles.