Whether you’re using water, milk, or buttermilk, you can whisk in: a teaspoon or two of flour ,This creates a thin batter that grabs the crumbs more evenly and gives you a thicker, more consistent crust. It’s a smart, practical trick used in many German and German American kitchens, You get a nice full bodied crust that is great when you are doing lots of Schnitzels or heartier ones like Chicken fried Steak.
Mix the water or milk, and if you want some seasonings; Worcestershire sauce, and spices like a teaspoon, of garlic and onion powder, pepper, paprika together with the flour to make a thickened batter.
This will help it cling to the meat. Some folks use heavy cream in place of the milk, and cut down on the flour. Dip the Schnitzel into the breading mix, flip it over and press the crumbs into the meat. Place on a board or plate. Repeat and stack the schnitzels and let them sit for a few minutes before frying to let the breading set.