To get an even golden-brown color on both sides of a cutlet, make sure your patties are uniform in thickness, thoroughly preheat your pan and oil, and keep the heat consistent at a medium level.
Achieving that beautiful, even browning comes down to consistent heat and cooking time. First, aim for all your cutlets to be roughly the same thickness; this ensures they cook at the same rate. Before you even think about adding the cutlets, heat your pan and enough oil (enough to cover about half the cutlet's thickness) over medium heat until the oil is shimmering. This preheating step is crucial for creating an instant crust and stopping your cutlets from sticking. Place the cutlets in a single layer, making sure not to overcrowd the pan, which would drop the oil temperature. Once they're in, resist the urge to constantly poke and prod them! Let them cook undisturbed for several minutes until one side is a deep golden brown, then carefully flip them and cook the other side until it matches that gorgeous color. Keeping the heat consistent throughout the entire cooking process is super important.
If you're using a breadcrumb coating, really press those breadcrumbs firmly onto the cutlet. This helps them stick well and brown uniformly, preventing any patchy spots.