01 -
Arrange all ingredients and equipment for efficient workflow. Slice onions, measure flour, salt, and pepper, and have the liver ready for soaking.
02 -
Rinse liver slices under cold water and pat dry. Place in a shallow dish and cover fully with whole milk. Soak for at least 15 minutes to mellow the flavor and tenderize the liver.
03 -
Heat half the butter in a large skillet over medium heat. Add sliced onions, stirring occasionally. Cook slowly for 15 minutes until soft, translucent, and golden brown. Remove and set aside to prevent overcooking.
04 -
Drain liver from milk and pat dry. Combine flour, salt, and pepper on a large plate. Dredge each liver slice evenly in the flour mixture, shaking off excess to ensure a light, crisp coating.
05 -
Heat remaining butter in the skillet over medium-high heat until sizzling. Arrange liver slices in a single layer without overlap. Cook undisturbed for 3-4 minutes until a golden crust forms on one side. Flip carefully and cook an additional 2-3 minutes, leaving centers slightly pink for tenderness.
06 -
Return caramelized onions to the skillet over the liver slices. Reduce heat to medium and cook together for 1-2 minutes to blend flavors and warm evenly. Avoid overcooking the liver to maintain tenderness.
07 -
Plate liver slices and spoon buttery caramelized onions on top. Serve immediately while hot, ideally paired with creamy mashed potatoes or crusty bread to soak up the pan juices.