01 - Place beef escalopes 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 dishes: first with flour mixed with salt and pepper, second with beaten eggs whisked with milk, and third with panko breadcrumbs combined with grated Parmesan.
03 - Dredge each escalope in the flour mixture, shaking off excess. Dip into the egg mixture, allowing excess to drip off, then press firmly into the breadcrumb mixture to coat evenly on both sides.
04 - Combine vegetable oil and butter in a large frying pan. Heat over medium-high heat until the butter foams slightly and the mixture 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 and ensure even browning.
06 - Transfer cooked escalopes to paper towels to drain excess oil. Keep warm in a low oven if needed while cooking remaining batches.
07 - Plate the crispy escalopes hot, garnished generously with chopped fresh parsley and accompanied by lemon wedges for squeezing over the top.