01 - Pound beef escalopes between plastic wrap until approximately 0.2 inch thick for even cooking.
02 - Arrange three shallow dishes: flour seasoned with salt and pepper; beaten eggs whisked with milk; panko breadcrumbs mixed with grated Parmesan.
03 - Dredge each escalope in flour, shaking off excess. Dip into egg mixture, then press firmly into breadcrumb mixture to ensure thorough coating.
04 - Combine vegetable oil and butter in large frying pan. Heat over medium-high heat until butter foams slightly.
05 - Cook escalopes for 2 to 3 minutes per side until deep golden brown and crispy. Fry in batches without overcrowding pan.
06 - Transfer cooked escalopes to paper towels to drain excess oil. Keep warm in low oven if not serving immediately.
07 - Plate immediately, garnishing generously with chopped parsley and fresh lemon wedges on the side.