01 - Place each beef escalope between two sheets of plastic wrap and gently pound with a meat mallet until approximately ¼ inch thick for even cooking.
02 - Prepare three shallow bowls: first with flour mixed with salt and pepper; second with beaten eggs whisked with milk; third with panko breadcrumbs combined with grated Parmesan.
03 - Dredge each escalope in flour, shaking off excess. Dip into egg mixture, allowing excess to drip off. Press firmly into breadcrumb mixture to coat evenly on both sides.
04 - Heat vegetable oil and butter in a large skillet over medium-high heat until butter foams slightly and oil shimmers.
05 - Cook escalopes for 2 to 3 minutes per side until golden brown and crispy. Fry in batches without overcrowding the pan to maintain proper temperature.
06 - Transfer cooked escalopes to paper towels to drain excess oil. Keep warm in a low oven if necessary while finishing remaining batches.
07 - Plate escalopes while hot, garnish generously with chopped fresh parsley, and accompany with lemon wedges for squeezing over the crispy crust.