01 - Place each beef escalope between two sheets of plastic wrap. Using a meat mallet or rolling pin, pound gently until the meat reaches approximately ¼-inch thickness for even cooking.
02 - Arrange three shallow dishes in sequence. Place flour seasoned with salt and pepper in the first dish. Whisk eggs with milk in the second dish. Combine panko breadcrumbs and grated Parmesan in the third dish.
03 - Dredge each escalope in the seasoned flour, shaking off excess. Transfer to the egg mixture, ensuring complete coverage. Finally, press firmly into the breadcrumb-Parmesan mixture, coating both sides thoroughly.
04 - In a large skillet over medium-high heat, combine vegetable oil and butter. Swirl to melt butter evenly and wait for the mixture to shimmer slightly.
05 - Working in batches to avoid overcrowding, place coated escalopes in the hot pan. Fry for 2-3 minutes per side until deep golden brown and crispy. Adjust heat if browning occurs too quickly.
06 - Transfer cooked escalopes to paper towel-lined plates to drain excess oil. Serve immediately while hot and crispy, garnished generously with fresh parsley and accompanied by lemon wedges.