How to Cook Liver in the Oven

by Amelia Allonsy

Liver is commonly fried with onions or with both onions and bacon, but to cut down on the fat, you can cook it in the oven. A diet with liver is commonly prescribed to treat blood deficiencies such as pernicious anemia; liver, an excellent source of heme iron, also contains vitamins, protein, minerals and amino acids that are essential to human health. Try liver served with mashed potatoes and white gravy on the side.

Rinse the liver slices gently under cold, running water.

Place the liver slices in a medium or large mixing bowl and cover the liver with cold milk. Cover the bowl with plastic wrap and allow the liver to soak for about one to two hours. While optional, this process helps mellow the often strong, bitter flavor of beef liver, making it more palatable for children and others who might be wary of eating liver.

Slice one or two large onions into rings. Cut each end from the onions and remove the papery skin. Cut the onion crosswise to make rings.

Pre-heat your oven to about 375 degrees Fahrenheit. Grease a baking dish with olive oil or a similar cooking oil rubbed on with a paper towel. Use a baking dish large enough to lay the liver in the pan in a single layer.

Line the bottom of the baking dish with about half of the onions placed in a single layer.

Remove the liver from the milk. Place the liver slices on a cutting board and gently pat them dry with a paper towel. Sprinkle your choice of spices, such as salt and pepper, evenly on both sides of the liver slices.

Place the liver in the baking dish in a single layer on top of the bed of onion rings. Lightly coat the liver with olive or cooking oil. Top the liver with the remaining onions arranged in a single layer.

Place the baking dish centered on the oven baking rack. Bake the liver between 30 to 35 minutes until the liver is completely cooked. Cut into a section of liver with a knife to check if the liver is finished cooking. The liver is done when pink liquid rises from the liver, and you can easily pierce it with a knife or fork.

Remove the baking dish from the oven when done. You can serve it from the baking dish or transfer the liver and onions to a serving plate.

Items you will need

  • Medium or large mixing bowl
  • Milk
  • Plastic wrap
  • Onions
  • Cutting board
  • Kitchen knife
  • Baking dish
  • Cooking oil
  • Paper towel
  • Assorted spices
  • Serving plate


  • If desired, arrange bacon in a single layer on the bottom of the baking dish before adding the first layer of onions. Top the dish with bacon slices arranged over the top layer of onions. Layer in this order: bacon, onions, liver, onions and bacon.

About the Author

A former cake decorator and competitive horticulturist, Amelia Allonsy is most at home in the kitchen or with her hands in the dirt. She received her Bachelor's degree from West Virginia University. Her work has been published in the San Francisco Chronicle and on other websites.