01 - In a shallow dish, whisk together the all-purpose flour, salt, black pepper, paprika, and garlic powder until evenly combined. Set aside 2 to 3 tablespoons of the seasoned flour for the gravy.
02 - Pat the cube steaks dry with paper towels. Dredge each piece through the seasoned flour mixture, coating both sides thoroughly. Shake off any excess and transfer to a clean plate.
03 - Heat 2 tablespoons of vegetable oil in a large skillet over medium-high heat until shimmering. Working in batches to avoid crowding, sear the cube steaks for 2 to 3 minutes per side until a deep golden crust forms. Remove the steaks to a plate and set aside.
04 - Reduce heat to medium. Add the remaining 1 tablespoon of vegetable oil to the skillet. Add the thinly sliced onion and cook for 5 to 6 minutes, stirring occasionally, until softened and golden. Stir in the minced garlic and cook for 1 additional minute until fragrant.
05 - Sprinkle 2 to 3 tablespoons of the reserved seasoned flour over the onions and stir continuously for 1 minute to cook out the raw flour taste. Slowly pour in the beef broth and milk, scraping the bottom of the skillet to deglaze and release all the browned bits. 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.
06 - Return the seared cube steaks and any accumulated juices back to the skillet, nestling them down into the gravy. Cover with a lid, reduce the 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.
07 - Taste the gravy and adjust the seasoning with salt and pepper as needed. Transfer the steaks to serving plates, spoon the onion gravy generously over the top, and garnish with freshly chopped parsley. Serve hot alongside mashed potatoes, rice, or buttered egg noodles.